[PATCH] Style: use ngx_free() instead of free()

[Tatsuhiko Kubo]

# HG changeset patch
# User Tatsuhiko Kubo <cubicdaiya at gmail.com>
# Date 1407004059 -32400
#      Sun Aug 03 03:27:39 2014 +0900
# Node ID fbdab7f38fd639b763f78136535cbe6788bcadf0
# Parent  f87afb46ccd26fccc7ed55ca8a7ef89c6256c3f2
Style: use ngx_free() instead of free().

diff -r f87afb46ccd2 -r fbdab7f38fd6 src/os/win32/ngx_files.c
--- a/src/os/win32/ngx_files.c	Fri Aug 01 20:04:14 2014 +0900
+++ b/src/os/win32/ngx_files.c	Sun Aug 03 03:27:39 2014 +0900
@@ -864,7 +864,7 @@ ngx_utf8_to_utf16(u_short *utf16, u_char
         n = ngx_utf8_decode(&p, 4);
 
         if (n > 0x10ffff) {
-            free(utf16);
+            ngx_free(utf16);
             ngx_set_errno(NGX_EILSEQ);
             return NULL;
         }