default to false instead of null

src/mod/applications/mod_lcr/mod_lcr.c

@@ -1119,7 +1119,7 @@ static switch_status_t lcr_load_config()
 					}
 
 					if (db_check("SELECT lrn FROM lcr LIMIT 1") != SWITCH_TRUE) {
-						if (db_check("ALTER TABLE lcr add lrn boolean")) {
+						if (db_check("ALTER TABLE lcr ADD lrn BOOLEAN NOT NULL DEFAULT false")) {
 							switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "adding lrn field to your lcr database schema.\n");
 						} else {
 							return SWITCH_FALSE;