typefind: Avoid overflow calculation (image/quicktime)

The qt typefinder uses guint64 values for offset and size calculation
but the typefinder system only supports gint64 values.

Make sure we don't end up using potentially overflowing values.

1 files changed, 2 insertions, 0 deletions

diff --git a/gst/typefind/gsttypefindfunctions.c b/gst/typefind/gsttypefindfunctions.c
index 44a146acb..e5259de35 100644
--- a/gst/typefind/gsttypefindfunctions.c
+++ b/gst/typefind/gsttypefindfunctions.c
@@ -3364,6 +3364,8 @@ qtif_type_find (GstTypeFind * tf, gpointer unused)
     }
 
     offset += size;
+    if (offset + 8 >= G_MAXINT64)
+      break;
     if (++rounds > QTIF_MAXROUNDS)
       break;
   }