res_indications: Fix indications remove command autocomplete

We changed the validation of autocomplete parameter in the "indications
remove" command to avoid continue the execution of the command after
asking for autocomplete out of range parameters.

ASTERISK-28391
Reported by: lmendes86

Change-Id: I92b24131fd02f2e3c7fec966eea6f7a663310d40

main/indications.c

@@ -764,9 +764,11 @@ static char *handle_cli_indication_remove(struct ast_cli_entry *e, int cmd, stru
 	case CLI_GENERATE:
 		if (a->pos == 2) {
 			return complete_country(a);
-		} else if (a->pos == 3) {
+		}
+		if (a->pos == 3) {
 			return complete_indications(a);
 		}
+		return NULL;
 	}
 
 	if (a->argc != 3 && a->argc != 4) {