Merge remote-tracking branch 'qatar/master'

* qatar/master:
  prores: Error out only on surely incomplete ac_coeffs

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

libavcodec/proresdec_lgpl.c

@@ -391,7 +391,7 @@ static inline int decode_ac_coeffs(GetBitContext *gb, int16_t *out,
 
         bits_left = get_bits_left(gb);
         if (bits_left <= 0 || (bits_left <= 8 && !show_bits(gb, bits_left)))
-            return AVERROR_INVALIDDATA;
+            return 0;
 
         run = decode_vlc_codeword(gb, ff_prores_ac_codebook[run_cb_index]);