modules/http/http_filters.c:151: error: UNINITIALIZED_VALUE
  The value read from len was never initialized.

modules/http/http_filters.c:151:10: 
149.     }
150.     /* We had no data in this brigade */
151.     if (!len || e == APR_BRIGADE_SENTINEL(b)) {
              ^
152.         return APR_EAGAIN;
153.     }
