sharkd: reduce buffer put on stack from 16K to 2K

Change-Id: Ie86f68ed48b881f4803377a3e1ad94fcfe1947e3
Reviewed-on: https://code.wireshark.org/review/21079
Reviewed-by: Jakub Zawadzki <darkjames-ws@darkjames.pl>

sharkd_session.c

@@ -3223,7 +3223,7 @@ sharkd_session_process(char *buf, const jsmntok_t *tokens, int count)
 int
 sharkd_session_main(void)
 {
-	char buf[16 * 1024];
+	char buf[2 * 1024];
 	jsmntok_t *tokens = NULL;
 	int tokens_max = -1;