Win32: MinGW GCC compatibility.

Several warnings silenced, notably (ngx_socket_t) -1 is now checked
on socket operations instead of -1, as ngx_socket_t is unsigned on win32
and gcc complains on comparison.

With this patch, it's now possible to compile nginx using mingw gcc,
with options we normally compile on win32.

1 files changed, 3 insertions, 3 deletions

diff --git a/src/core/ngx_connection.c b/src/core/ngx_connection.c
index e12d3efc0..28bf6ba06 100644
--- a/src/core/ngx_connection.c
+++ b/src/core/ngx_connection.c
@@ -297,7 +297,7 @@ ngx_open_listening_sockets(ngx_cycle_t *cycle)
                 continue;
             }
 
-            if (ls[i].fd != -1) {
+            if (ls[i].fd != (ngx_socket_t) -1) {
                 continue;
             }
 
@@ -312,7 +312,7 @@ ngx_open_listening_sockets(ngx_cycle_t *cycle)
 
             s = ngx_socket(ls[i].sockaddr->sa_family, ls[i].type, 0);
 
-            if (s == -1) {
+            if (s == (ngx_socket_t) -1) {
                 ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
                               ngx_socket_n " %V failed", &ls[i].addr_text);
                 return NGX_ERROR;
@@ -863,7 +863,7 @@ ngx_close_connection(ngx_connection_t *c)
     ngx_uint_t    log_error, level;
     ngx_socket_t  fd;
 
-    if (c->fd == -1) {
+    if (c->fd == (ngx_socket_t) -1) {
         ngx_log_error(NGX_LOG_ALERT, c->log, 0, "connection already closed");
         return;
     }