Update game.cpp

bug fix:
while game exits with abnormal behavior, tMap list won't be freed.

Classes/gframe/game.cpp

@@ -207,6 +207,7 @@ bool Game::Initialize(ANDROID_APP app, android::InitOptions *options) {
 	driver->setTextureCreationFlag(irr::video::ETCF_OPTIMIZED_FOR_QUALITY, true);
 
 	imageManager.SetDevice(device);
+	imageManager.ClearTexture();
 	if(!imageManager.Initial(workingDir))
 		return false;
 	// LoadExpansions only load zips, the other cdb databases are still loaded by getDBFiles
@@ -2092,4 +2093,4 @@ void Game::OnGameClose() {
 	android::onGameExit(appMain);
     this->device->closeDevice();
 }
-}
\ No newline at end of file
+}