libavcodec/h264_cavlc.c:912: error: Uninitialized Value
  The value read from sub_partition_count[_] was never initialized.

libavcodec/h264_cavlc.c:912:30: 
910.                     const int sub_mb_type= sl->sub_mb_type[i];
911.                     const int block_width= (sub_mb_type & (MB_TYPE_16x16|MB_TYPE_16x8)) ? 2 : 1;
912.                     for(j=0; j<sub_partition_count[i]; j++){
                                  ^
913.                         int mx, my;
914.                         const int index= 4*i + block_width*j;
