Revert "Fix inventory items blinking on item preloading"

The fix didn't work on some systems sadly this wasn't detected prior merge,
as preload is disabled by default now there's not gonna be a fix for it.

src/tile.cpp

@@ -894,7 +894,9 @@ video::ITexture* TextureSource::generateTextureFromMesh(
 			params.light_radius);
 
 	// Render scene
+	driver->beginScene(true, true, video::SColor(0,0,0,0));
 	smgr->drawAll();
+	driver->endScene();
 
 	// Drop scene manager
 	smgr->drop();
@@ -974,7 +976,7 @@ video::IImage* TextureSource::generateImage(const std::string &name)
 
 	std::string last_part_of_name = name.substr(last_separator_pos + 1);
 
-	/*
+	/* 
 		If this name is enclosed in parentheses, generate it
 		and blit it onto the base image
 	*/