stanza: guard mallocs

If this happens we have more serious problems :-)
But anyways..

src/xmpp/iq.c

@@ -288,12 +288,14 @@ void
 iq_id_handler_add(const char* const id, ProfIqCallback func, ProfIqFreeCallback free_func, void* userdata)
 {
     ProfIqHandler* handler = malloc(sizeof(ProfIqHandler));
+    if (handler) {
         handler->func = func;
         handler->free_func = free_func;
         handler->userdata = userdata;
 
         g_hash_table_insert(id_handlers, strdup(id), handler);
     }
+}
 
 void
 iq_autoping_timer_cancel(void)
@@ -481,17 +483,19 @@ iq_room_info_request(const char* const room, gboolean display_result)
     xmpp_stanza_t* iq = stanza_create_disco_info_iq(ctx, id, room, NULL);
 
     ProfRoomInfoData* cb_data = malloc(sizeof(ProfRoomInfoData));
+    if (cb_data) {
         cb_data->room = strdup(room);
         cb_data->display = display_result;
 
         iq_id_handler_add(id, _room_info_response_id_handler, (ProfIqFreeCallback)_iq_free_room_data, cb_data);
 
-    free(id);
-
         iq_send_stanza(iq);
         xmpp_stanza_release(iq);
     }
 
+    free(id);
+}
+
 void
 iq_send_caps_request_for_jid(const char* const to, const char* const id,
                              const char* const node, const char* const ver)
@@ -667,6 +671,7 @@ iq_room_affiliation_list(const char* const room, char* affiliation, bool show_ui
     const char* id = xmpp_stanza_get_id(iq);
 
     ProfAffiliationList* affiliation_list = malloc(sizeof(ProfAffiliationList));
+    if (affiliation_list) {
         affiliation_list->affiliation = strdup(affiliation);
         affiliation_list->show_ui_message = show_ui_message;
 
@@ -675,6 +680,7 @@ iq_room_affiliation_list(const char* const room, char* affiliation, bool show_ui
         iq_send_stanza(iq);
         xmpp_stanza_release(iq);
     }
+}
 
 void
 iq_room_kick_occupant(const char* const room, const char* const nick, const char* const reason)
@@ -699,6 +705,7 @@ iq_room_affiliation_set(const char* const room, const char* const jid, char* aff
     const char* id = xmpp_stanza_get_id(iq);
 
     ProfPrivilegeSet* affiliation_set = malloc(sizeof(struct privilege_set_t));
+    if (affiliation_set) {
         affiliation_set->item = strdup(jid);
         affiliation_set->privilege = strdup(affiliation);
 
@@ -707,6 +714,7 @@ iq_room_affiliation_set(const char* const room, const char* const jid, char* aff
         iq_send_stanza(iq);
         xmpp_stanza_release(iq);
     }
+}
 
 void
 iq_room_role_set(const char* const room, const char* const nick, char* role,
@@ -718,6 +726,7 @@ iq_room_role_set(const char* const room, const char* const nick, char* role,
     const char* id = xmpp_stanza_get_id(iq);
 
     struct privilege_set_t* role_set = malloc(sizeof(ProfPrivilegeSet));
+    if (role_set) {
         role_set->item = strdup(nick);
         role_set->privilege = strdup(role);
 
@@ -726,6 +735,7 @@ iq_room_role_set(const char* const room, const char* const nick, char* role,
         iq_send_stanza(iq);
         xmpp_stanza_release(iq);
     }
+}
 
 void
 iq_room_role_list(const char* const room, char* role)
@@ -2162,6 +2172,7 @@ _room_info_response_id_handler(xmpp_stanza_t* const stanza, void* const userdata
                 if (name || category || type) {
                     DiscoIdentity* identity = malloc(sizeof(struct disco_identity_t));
 
+                    if (identity) {
                         if (name) {
                             identity->name = strdup(name);
                             ProfMucWin* mucwin = wins_get_muc(cb_data->room);
@@ -2185,6 +2196,7 @@ _room_info_response_id_handler(xmpp_stanza_t* const stanza, void* const userdata
                         identities = g_slist_append(identities, identity);
                     }
                 }
+            }
 
             child = xmpp_stanza_get_next(child);
         }
@@ -2309,6 +2321,7 @@ _disco_info_response_id_handler(xmpp_stanza_t* const stanza, void* const userdat
                 if (name || category || type) {
                     DiscoIdentity* identity = malloc(sizeof(struct disco_identity_t));
 
+                    if (identity) {
                         if (name) {
                             identity->name = strdup(name);
                         } else {
@@ -2328,6 +2341,7 @@ _disco_info_response_id_handler(xmpp_stanza_t* const stanza, void* const userdat
                         identities = g_slist_append(identities, identity);
                     }
                 }
+            }
 
             child = xmpp_stanza_get_next(child);
         }
@@ -2491,6 +2505,7 @@ _disco_items_result_handler(xmpp_stanza_t* const stanza)
             const char* item_jid = xmpp_stanza_get_attribute(child, STANZA_ATTR_JID);
             if (item_jid) {
                 DiscoItem* item = malloc(sizeof(struct disco_item_t));
+                if (item) {
                     item->jid = strdup(item_jid);
                     const char* item_name = xmpp_stanza_get_attribute(child, STANZA_ATTR_NAME);
                     if (item_name) {
@@ -2501,6 +2516,7 @@ _disco_items_result_handler(xmpp_stanza_t* const stanza)
                     items = g_slist_append(items, item);
                 }
             }
+        }
 
         child = xmpp_stanza_get_next(child);
     }
@@ -2578,10 +2594,12 @@ iq_mam_request(ProfChatWin* win)
     xmpp_stanza_t* iq = stanza_create_mam_iq(ctx, win->barejid, datestr, NULL);
 
     MamRsmUserdata* data = malloc(sizeof(MamRsmUserdata));
+    if (data) {
         data->datestr = strdup(datestr);
         data->barejid = strdup(win->barejid);
 
         iq_id_handler_add(xmpp_stanza_get_id(iq), _mam_rsm_id_handler, NULL, data);
+    }
 
     g_free(datestr);
     g_date_time_unref(timestamp);