perform pending destroys before unlocking the submit mutex

src/Refresh_Driver_Vulkan.c

@@ -10048,11 +10048,11 @@ static void VULKAN_Submit(
 		}
 	}
 
-	SDL_UnlockMutex(renderer->submitLock);
-
 	/* Check pending destroys */
 
 	VULKAN_INTERNAL_PerformPendingDestroys(renderer);
+
+	SDL_UnlockMutex(renderer->submitLock);
 }
 
 /* Device instantiation */