core: remove_global: remove object from the list before triggering the notification

This avoids being able to find the same object on the globals list
from code that is connected to the signal.

lib/wp/core.c

@@ -193,6 +193,7 @@ wp_core_remove_global (WpCore * self, GQuark key, gpointer obj)
 {
   gint i;
   struct global_object *global;
+  struct global_object tmp;
 
   g_return_if_fail (WP_IS_CORE (self));
 
@@ -206,13 +207,15 @@ wp_core_remove_global (WpCore * self, GQuark key, gpointer obj)
   }
 
   if (i < self->global_objects->len) {
-    g_signal_emit (self, signals[SIGNAL_GLOBAL_REMOVED], key,
-        key, global->object);
-
-    if (global->destroy)
-      global->destroy (global->object);
+    tmp = *global;
 
     g_ptr_array_remove_index_fast (self->global_objects, i);
+
+    g_signal_emit (self, signals[SIGNAL_GLOBAL_REMOVED], key,
+        key, tmp.object);
+
+    if (tmp.destroy)
+      tmp.destroy (tmp.object);
   }
 }