HTTP texture fix - the brutal and inefficient way -.-

indra/newview/lltexturefetch.cpp

@@ -1282,6 +1282,8 @@ bool LLTextureFetchWorker::doWork(S32 param)
 						return true ; //abort.
 					}
 				}
+				resetFormattedData();
+				cur_size = 0;
 			}
 			mRequestedSize = mDesiredSize;
 			mRequestedDiscard = mDesiredDiscard;