src/core/ngx_sha1.c:233: error: Uninitialized Value
  The value read from words[_] was never initialized.

src/core/ngx_sha1.c:233:9: 
231.         STEP(F2, a, b, c, d, e, words[37], 0x6ed9eba1);
232.         STEP(F2, a, b, c, d, e, words[38], 0x6ed9eba1);
233.         STEP(F2, a, b, c, d, e, words[39], 0x6ed9eba1);
             ^
234. 
235.         STEP(F3, a, b, c, d, e, words[40], 0x8f1bbcdc);
