fix style broken by 3a8a53c0c42f

[Peng Fang]

# HG changeset patch
# User peng fang <fangpeng1986 at gmail.com>
# Date 1524558323 -28800
# Node ID 5b84c8dc4cf5e909673adc24e044a7644da7f8d5
# Parent  7c614ef3c6ea330c62630d5065f961a27d0f82cd
Style.

Fix style broken by 3a8a53c0c42f.

diff -r 7c614ef3c6ea -r 5b84c8dc4cf5 src/http/ngx_http_cache.h
--- a/src/http/ngx_http_cache.h Wed Apr 18 16:11:41 2018 +0300
+++ b/src/http/ngx_http_cache.h Tue Apr 24 16:25:23 2018 +0800
@@ -191,7 +191,7 @@
 ngx_int_t ngx_http_file_cache_set_header(ngx_http_request_t *r, u_char
*buf);
 void ngx_http_file_cache_update(ngx_http_request_t *r, ngx_temp_file_t
*tf);
 void ngx_http_file_cache_update_header(ngx_http_request_t *r);
-ngx_int_t ngx_http_cache_send(ngx_http_request_t *);
+ngx_int_t ngx_http_cache_send(ngx_http_request_t *r);
 void ngx_http_file_cache_free(ngx_http_cache_t *c, ngx_temp_file_t *tf);
 time_t ngx_http_file_cache_valid(ngx_array_t *cache_valid, ngx_uint_t
status);
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