Avcodec: safeguard for people not using the latest libavcodec

modules/codec/avcodec/audio.c

@@ -191,9 +191,11 @@ int InitAudioDec( decoder_t *p_dec, AVCodecContext *p_context,
     case CODEC_ID_FLAC:
         p_sys->i_output_max = 8 * sizeof(int32_t) * 65535;
         break;
+#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT( 52, 35, 0 )
     case CODEC_ID_WMAPRO:
         p_sys->i_output_max = 8 * sizeof(float) * 6145; /* (1 << 12) * 3/2 */
         break;
+#endif
     default:
         p_sys->i_output_max = 0;
         break;