avcodec/intelh263dec: Use skip_1stop_8data_bits()

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

libavcodec/intelh263dec.c

@@ -111,11 +111,8 @@ int ff_intel_h263_decode_picture_header(MpegEncContext *s)
     }
 
     /* PEI */
-    while (get_bits1(&s->gb) != 0) {
+    if (skip_1stop_8data_bits(&s->gb) < 0)
-        skip_bits(&s->gb, 8);
+        return AVERROR_INVALIDDATA;
-        if (get_bits_left(&s->gb) <= 0)
-            return AVERROR_INVALIDDATA;
-    }
     s->f_code = 1;
 
     s->y_dc_scale_table=