usrloc: fix condition for keepalive interval

src/modules/usrloc/ul_keepalive.c

@@ -164,7 +164,7 @@ int ul_ka_urecord(urecord_t *ur)
 		}
 		if(ul_ka_interval > 0 && uc->last_keepalive > 0) {
 			ka_limit = ul_ka_interval + (fastrand() % ul_ka_randomize);
-			if((uc->last_keepalive + ka_limit) < tnow) {
+			if((uc->last_keepalive + ka_limit) > tnow) {
 				/* not yet the time for keepalive */
 				continue;
 			}