src/core/ngx_sha1.c:228: error: Uninitialized Value
  The value read from words[_] was never initialized.

src/core/ngx_sha1.c:228:9: 
226.         STEP(F2, a, b, c, d, e, words[32], 0x6ed9eba1);
227.         STEP(F2, a, b, c, d, e, words[33], 0x6ed9eba1);
228.         STEP(F2, a, b, c, d, e, words[34], 0x6ed9eba1);
             ^
229.         STEP(F2, a, b, c, d, e, words[35], 0x6ed9eba1);
230.         STEP(F2, a, b, c, d, e, words[36], 0x6ed9eba1);
