Removed unneeded variables from bot.c.

examples/bot.c

@@ -20,6 +20,7 @@
 */
 
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 
 #include <strophe.h>
@@ -28,8 +29,6 @@
 int version_handler(xmpp_conn_t * const conn, xmpp_stanza_t * const stanza, void * const userdata)
 {
 	xmpp_stanza_t *reply, *query, *name, *version, *text;
-	char *buf;
-	size_t len;
 	xmpp_ctx_t *ctx = (xmpp_ctx_t*)userdata;
 	printf("Received version request from %s\n", xmpp_stanza_get_attribute(stanza, "from"));