use lower-case labels

Signed-off-by: Steffen Jaeckel <jaeckel-floss@eyet-services.de>

src/event.c

@@ -110,7 +110,7 @@ void xmpp_run_once(xmpp_ctx_t *ctx, unsigned long timeout)
                 xmpp_debug(ctx, "xmpp", "Send error occurred, disconnecting.");
                 conn->error = ECONNABORTED;
                 conn_disconnect(conn);
-                goto NEXT_ITEM;
+                goto next_item;
             }
         }
 
@@ -158,7 +158,7 @@ void xmpp_run_once(xmpp_ctx_t *ctx, unsigned long timeout)
             conn->error = ECONNABORTED;
             conn_disconnect(conn);
         }
-NEXT_ITEM:
+next_item:
         connitem = connitem->next;
     }