libavcodec/xl.c:97: error: Uninitialized Value
  The value read from c1 was never initialized.

libavcodec/xl.c:97:17: 
95.                 c1 = (val & 0x1F) << 2;
96.             else
97.                 c1 += xl_table[val & 0x1F];
                    ^
98. 
99.             Y[j + 0] = y0 << 1;
