style fix

src/http/ngx_http_request.c

diff --git a/src/http/ngx_http_request.c b/src/http/ngx_http_request.c
index 5258ad9..9ea987f 100644
--- a/src/http/ngx_http_request.c
+++ b/src/http/ngx_http_request.c
@@ -1836,7 +1836,7 @@
 
     if (!ngx_terminate
          && !ngx_exiting
-         && r->keepalive != 0
+         && r->keepalive
          && clcf->keepalive_timeout > 0)
     {
         ngx_http_set_keepalive(r);

src/http/ngx_http_special_response.c

diff --git a/src/http/ngx_http_special_response.c b/src/http/ngx_http_special_response.c
index 306944b..32b2ed5 100644
--- a/src/http/ngx_http_special_response.c
+++ b/src/http/ngx_http_special_response.c
@@ -343,7 +343,7 @@
 
     r->err_status = error;
 
-    if (r->keepalive != 0) {
+    if (r->keepalive) {
         switch (error) {
             case NGX_HTTP_BAD_REQUEST:
             case NGX_HTTP_REQUEST_ENTITY_TOO_LARGE: