Qt: Fix file handle leak on opening an invalid ROM

CHANGES

@@ -30,6 +30,7 @@ Other fixes:
  - GBA Savedata: Fix extracting save when not yet configured in-game
  - Qt: Force OpenGL paint engine creation thread (fixes mgba.io/i/1642)
  - Qt: Fix static compilation in MinGW (fixes mgba.io/i/1769)
+ - Qt: Fix file handle leak on opening an invalid ROM
 Misc:
  - Debugger: Keep track of global cycle count
  - FFmpeg: Add looping option for GIF/APNG

src/platform/qt/CoreManager.cpp

@@ -83,6 +83,7 @@ CoreController* CoreManager::loadGame(VFile* vf, const QString& path, const QStr
 
 	mCore* core = mCoreFindVF(vf);
 	if (!core) {
+		vf->close(vf);
 		LOG(QT, ERROR) << tr("Could not load game. Are you sure it's in the correct format?");
 		return nullptr;
 	}