Warnings when compiling with NGINX

[RaeesBhatti]

Hey there, I'm trying to compile NGINX with neverbleed using this patch but getting these warnings.

src/event/neverbleed.c: In function 'expbuf_reserve':
src/event/neverbleed.c:159:15: error: comparison between signed and unsigned integer expressions [-Werror=sign-compare]
     if (extra <= buf->buf + buf->capacity - buf->end)
               ^
src/event/neverbleed.c:164:48: error: comparison between signed and unsigned integer expressions [-Werror=sign-compare]
     while (buf->buf + buf->capacity - buf->end < extra)
                                                ^
src/event/neverbleed.c: In function 'expbuf_write':
src/event/neverbleed.c:245:28: error: comparison between signed and unsigned integer expressions [-Werror=sign-compare]
         while (r != 0 && r >= vecs[vecindex].iov_len) {
                            ^
src/event/neverbleed.c:250:37: error: pointer of type 'void *' used in arithmetic [-Werror=pointer-arith]
             vecs[vecindex].iov_base += r;
                                     ^
src/event/neverbleed.c: At top level:
src/event/neverbleed.c:353:1: error: missing initializer for field 'size' of 'struct <anonymous>' [-Werror=missing-field-initializers]
 } daemon_vars = {{PTHREAD_MUTEX_INITIALIZER}};
 ^
src/event/neverbleed.c:349:16: note: 'size' declared here
         size_t size;
                ^
src/event/neverbleed.c:353:1: error: missing initializer for field 'nb' of 'struct <anonymous>' [-Werror=missing-field-initializers]
 } daemon_vars = {{PTHREAD_MUTEX_INITIALIZER}};
 ^
src/event/neverbleed.c:352:19: note: 'nb' declared here
     neverbleed_t *nb;