Fixed user dir existence check when creating new user

The check was done too later. It turns out that createUser() had already
created the dir, which caused the warning message to be shown every
time.

settings/ajax/createuser.php

@@ -28,6 +28,10 @@ $password = $_POST["password"];
 
 // Return Success story
 try {
+	// check whether the user's files home exists
+	$userDirectory = OC_User::getHome($username) . '/files/';
+	$homeExists = file_exists($userDirectory);
+
 	if (!OC_User::createUser($username, $password)) {
 		OC_JSON::error(array('data' => array( 'message' => 'User creation failed for '.$username )));
 		exit();
@@ -39,10 +43,6 @@ try {
 		OC_Group::addToGroup( $username, $i );
 	}
 
-	// check whether the user's files home exists
-	$userDirectory = OC_User::getHome($username) . '/files/';
-	$homeExists = file_exists($userDirectory);
-
 	OC_JSON::success(array("data" =>
 				array(
 					// returns whether the home already existed