Fixed alpha textures not entering the alpha pool an alternative way.

indra/newview/lldrawable.cpp

@@ -802,6 +802,7 @@ void LLDrawable::updateTexture()
 			}
 		}*/
 				
+		getVOVolume()->mFaceMappingChanged = TRUE;
 		gPipeline.markRebuild(this, LLDrawable::REBUILD_MATERIAL, TRUE);
 	}
 }

indra/newview/llvovolume.cpp

@@ -1433,7 +1433,7 @@ BOOL LLVOVolume::updateGeometry(LLDrawable *drawable)
 		return TRUE; // No update to complete
 	}
 
-	if (mVolumeChanged || mFaceMappingChanged || mDrawable->isState(LLDrawable::REBUILD_MATERIAL))
+	if (mVolumeChanged || mFaceMappingChanged)
 	{
 		dirtySpatialGroup(drawable->isState(LLDrawable::IN_REBUILD_Q1));