ffio_read: dont spam the user at EOF with a truncation error

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavformat/utils.c

@@ -287,7 +287,7 @@ int ffio_limit(AVIOContext *s, int size)
         }
 
         if(s->maxsize>=0 && remaining+1 < size){
-            av_log(0, AV_LOG_ERROR, "Truncating packet of size %d to %"PRId64"\n", size, remaining+1);
+            av_log(0, remaining ? AV_LOG_ERROR : AV_LOG_DEBUG, "Truncating packet of size %d to %"PRId64"\n", size, remaining+1);
             size= remaining+1;
         }
     }