fix obsolete usage of OCdialogs

Signed-off-by: Arthur Schiwon <blizzz@arthur-schiwon.de>

apps/user_ldap/js/wizard/wizardTabGeneric.js

@@ -553,7 +553,7 @@ OCA = OCA || {};
 			) {
 				toggleFnc(true);
 			} else {
-				OCdialogs.confirm(
+				OC.dialogs.confirm(
 					t('user_ldap', 'Switching the mode will enable automatic LDAP queries. Depending on your LDAP size they may take a while. Do you still want to switch the mode?'),
 					t('user_ldap', 'Mode switch'),
 					toggleFnc