src/core/ngx_sha1.c:215: error: Uninitialized Value
  The value read from words[_] was never initialized.

src/core/ngx_sha1.c:215:9: 
213. 
214.         STEP(F2, a, b, c, d, e, words[20], 0x6ed9eba1);
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);
