libavutil/hwcontext.c:83: error: Uninitialized Value
  The value read from next was never initialized.

libavutil/hwcontext.c:83:21: 
81.         if (prev != AV_HWDEVICE_TYPE_NONE && hw_table[i]->type <= prev)
82.             continue;
83.         if (!set || hw_table[i]->type < next) {
                        ^
84.             next = hw_table[i]->type;
85.             set = 1;
