cdr_pgsql: Fix CLI "cdr show pgsql status" command.

The command always showed the usage information.

* Fix the error in command validation for CLI_SHOWUSAGE.

ASTERISK-24959 #close
Reported by: Rodrigo Ramirez Norambuena

Change-Id: I584f0936bb01001336a468a55c1d05d79fe795d5

cdr/cdr_pgsql.c

@@ -143,7 +143,7 @@ static char *handle_cdr_pgsql_status(struct ast_cli_entry *e, int cmd, struct as
 		return NULL;
 	}
 
-	if (a->argc != 3)
+	if (a->argc != e->args)
 		return CLI_SHOWUSAGE;
 
 	if (connected) {