ws: fix compile error on centos 7 - very old compiler (#1359)

* http: fix typo

* ws: fix comile error

On CentOS:

  CC       ws.lo
ws.c: In function 'get_ws_frame':
ws.c:244:3: error: 'for' loop initial declarations are only allowed in C99 mode
   for (int i = 0; i < payload_len; i++) {
   ^
ws.c:244:3: note: use option -std=c99 or -std=gnu99 to compile your code

1 files changed, 2 insertions, 1 deletions

diff --git a/ws.c b/ws.c
index de5cf6de..5acaf783 100644
--- a/ws.c
+++ b/ws.c
@@ -236,13 +236,14 @@ get_ws_frame(unsigned char *in_buffer, int buf_len, unsigned char **payload_ptr,
 	 */
 	if (masked) {
 		unsigned char *c;
+		int i;
 
 		mask = *((unsigned int *)(in_buffer + pos));
 		pos += 4;
 
 		/* unmask data */
 		c = in_buffer + pos;
-		for (int i = 0; i < payload_len; i++) {
+		for (i = 0; i < payload_len; i++) {
 			c[i] = c[i] ^ ((unsigned char *)(&mask))[i % 4];
 		}
 	}