src/core/ngx_sha1.c:195: error: Uninitialized Value
  The value read from words[_] was never initialized.

src/core/ngx_sha1.c:195:9: 
193.         STEP(F1, a, b, c, d, e, words[0],  0x5a827999);
194.         STEP(F1, a, b, c, d, e, words[1],  0x5a827999);
195.         STEP(F1, a, b, c, d, e, words[2],  0x5a827999);
             ^
196.         STEP(F1, a, b, c, d, e, words[3],  0x5a827999);
197.         STEP(F1, a, b, c, d, e, words[4],  0x5a827999);
