Merge commit '28eddef6'

* commit '28eddef6':
  hq_hqa: Validate get_vlc2 return value
Merged-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/hq_hqa.c

@@ -76,6 +76,9 @@ static int hq_decode_block(HQContext *c, GetBitContext *gb, int16_t block[64],
 
     for (;;) {
         val = get_vlc2(gb, c->hq_ac_vlc.table, 9, 2);
+        if (val < 0)
+            return AVERROR_INVALIDDATA;
+
         pos += ff_hq_ac_skips[val];
         if (pos >= 64)
             break;