typefind: Use GST_READ_UINT32 macros

Avoids undefined behaviour with shifting

diff --git a/gst/typefind/gsttypefindfunctions.c b/gst/typefind/gsttypefindfunctions.c
index c9a2c75..839ee4f 100644 (file)
--- a/gst/typefind/gsttypefindfunctions.c
+++ b/gst/typefind/gsttypefindfunctions.c
@@ -264,9 +264,9 @@ check_utf32 (const guint8 * data, gint len, gint endianness)
   while (len > 3) {
     guint32 v;
     if (endianness == G_BIG_ENDIAN)
-      v = (data[0] << 24) | (data[1] << 16) | (data[2] << 8) | data[3];
+      v = GST_READ_UINT32_BE (data);
     else
-      v = (data[3] << 24) | (data[2] << 16) | (data[1] << 8) | data[0];
+      v = GST_READ_UINT32_LE (data);
     if (v >= 0x10FFFF)
       return FALSE;
     data += 4;