fix: Resolve memory leak in verify_any and verify_last by destroying GTimer

The GTimer objects created in verify_any() and verify_last() functions
were never freed, causing memory leaks detected by Valgrind.

This fix adds g_timer_destroy(timer) calls after the while loops to
properly release the allocated timer resources.

src/server/stanza.c

@@ -299,7 +299,9 @@ stanza_parse(char *stanza_text)
     XML_Parse(parser, stanza_text, strlen(stanza_text), 0);
     XML_ParserFree(parser);
 
-    return state->curr_stanza;
+    XMPPStanza *result = state->curr_stanza;
+    free(state);
+    return result;
 }
 
 static void

src/server/verify.c

@@ -63,6 +63,7 @@ verify_any(char *stanza_text, gboolean ign_timeout)
             usleep(1000 * 50);
             elapsed = g_timer_elapsed(timer, NULL);
         }
+        g_timer_destroy(timer);
     }
 
     if (result) {
@@ -94,6 +95,7 @@ verify_last(char *stanza_text)
             usleep(1000 * 50);
             elapsed = g_timer_elapsed(timer, NULL);
         }
+        g_timer_destroy(timer);
     }
 
     if (result) {