pua_xmpp: fixed wrong define guardian id

modules/pua_xmpp/simple2xmpp.h

@@ -27,7 +27,7 @@
  */
 
 #ifndef SIP_XMPP_PRES_H
-#define SIP_XMPP__PRES_H
+#define SIP_XMPP_PRES_H
 
 #include "../pua/pua_bind.h"