fix up bit depth stuff

stepmania/src/RageTextureManager.cpp

@@ -191,7 +191,21 @@ void RageTextureManager::ReloadAll()
 	{
 		RageTexture* pTexture = i->second;
 
-		pTexture->Reload( i->first );
+		/* A note on how this really works:
+		 *
+		 * The ID identifies a texture, and all of the parameters needed
+		 * to produce it.  When we load a texture, iColorDepth is pulled
+		 * from GetTextureColorDepth().  Now we're reloading it, probably
+		 * due to a change in display settings, so we need to update that
+		 * to the current setting and reload it.  This will also change
+		 * the data in our map (which is OK; it's not part of the ordering)
+		 * to reflect this. */
+
+		/* Update the settings that are based on preferences. */
+		RageTextureID ID = i->first;
+		ID.iColorDepth = TEXTUREMAN->GetTextureColorDepth();
+
+		pTexture->Reload( ID );
 	}
 }