src/core/ngx_sha1.c:217: error: Uninitialized Value
  The value read from words[_] was never initialized.

src/core/ngx_sha1.c:217:9: 
215.         STEP(F2, a, b, c, d, e, words[21], 0x6ed9eba1);
216.         STEP(F2, a, b, c, d, e, words[22], 0x6ed9eba1);
217.         STEP(F2, a, b, c, d, e, words[23], 0x6ed9eba1);
             ^
218.         STEP(F2, a, b, c, d, e, words[24], 0x6ed9eba1);
219.         STEP(F2, a, b, c, d, e, words[25], 0x6ed9eba1);
