src/core/ngx_sha1.c:235: error: Uninitialized Value
  The value read from words[_] was never initialized.

src/core/ngx_sha1.c:235:9: 
233.         STEP(F2, a, b, c, d, e, words[39], 0x6ed9eba1);
234. 
235.         STEP(F3, a, b, c, d, e, words[40], 0x8f1bbcdc);
             ^
236.         STEP(F3, a, b, c, d, e, words[41], 0x8f1bbcdc);
237.         STEP(F3, a, b, c, d, e, words[42], 0x8f1bbcdc);
