Fix maybe uninitialized warnings

gladeui/glade-catalog.c

@@ -769,7 +769,7 @@ glade_catalog_load_all (void)
   /* First load catalogs from user specified directories ... */
   if ((search_path = g_getenv (GLADE_ENV_CATALOG_PATH)) != NULL)
     {
-      g_auto(GStrv) split;
+      g_auto(GStrv) split = NULL;
 
       if ((split = g_strsplit (search_path, ":", 0)) != NULL)
         {

src/glade-http.c

@@ -158,7 +158,7 @@ on_read_line_ready (GObject *source, GAsyncResult *res, gpointer data)
 {
   GladeHTTPPrivate *priv = GLADE_HTTP (data)->priv;
   g_autoptr (GError) error = NULL;
-  g_autofree gchar *line;
+  g_autofree gchar *line = NULL;
   gsize length;
 
   glade_http_emit_status (data, GLADE_HTTP_RECEIVING, NULL);

src/glade-registration.c

@@ -195,7 +195,7 @@ glade_registration_show_message (GladeRegistration *registration,
 
   if (format)
     {
-      g_autofree gchar *string;
+      g_autofree gchar *string = NULL;
       va_list args;
 
       va_start (args, format);
@@ -545,7 +545,7 @@ glade_registration_save_state_foreach (GtkWidget *widget, gpointer data)
         {
           GtkTextBuffer *buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (widget));
           GtkTextIter start, end;
-          g_autofree gchar *text;
+          g_autofree gchar *text = NULL;
 
           gtk_text_buffer_get_bounds (buffer, &start, &end);
           text = gtk_text_buffer_get_text (buffer, &start, &end, FALSE);