Check queue == NULL if we can't connect to server.

src/mir_window.c

@@ -426,6 +426,8 @@ void _glfwInitEventQueue(EventQueue* queue)
 }
 
 void _glfwDeleteEventQueue(EventQueue* queue)
+{
+    if (queue)
     {
         EventNode* node, *node_next;
         node = queue->head.tqh_first;
@@ -441,6 +443,9 @@ void _glfwDeleteEventQueue(EventQueue* queue)
         }
     }
 
+    free(queue);
+}
+
 //////////////////////////////////////////////////////////////////////////
 //////                       GLFW platform API                      //////
 //////////////////////////////////////////////////////////////////////////