crash fix

source/ubl-settings-video.c

@@ -77,8 +77,8 @@ gboolean on_terminal_check_progress(main_window *widgets){
         gtk_progress_bar_set_fraction(GTK_PROGRESS_BAR(widgets->TerminalInfoLabel), percentage / 100);
         g_free(last_match);
     }
-    g_free(text);
+    if (text) g_free(text);
-    g_match_info_unref(match);
+    if (match) g_match_info_unref(match);
 
     g_mutex_lock(&main_config.progress_mutex);
     if (percentage>99||!main_config.progress_active){
@@ -91,6 +91,9 @@ gboolean on_terminal_check_progress(main_window *widgets){
 }
 
 void on_command_cancel(GtkWidget *,main_window *widgets){
+    g_mutex_lock(&main_config.progress_mutex);
+    main_config.progress_active=0;
+    g_mutex_unlock(&main_config.progress_mutex);
     gtk_widget_destroy(widgets->TerminalRevealer);
 }