Issue #1527778 by damiankloip: View::save needs to check for machine name...

Issue #1527778 by damiankloip: View::save needs to check for machine name before saving. Not reliant on vid only.

lib/Drupal/views/View.php

@@ -1828,6 +1828,11 @@ function save() {
     if ($this->vid == 'new') {
       $this->vid = NULL;
     }
+    // If there is no vid, check if a view with this machine name already exists.
+    elseif (empty($this->vid)) {
+      $vid = db_query("SELECT vid from {views_view} WHERE name = :name", array(':name' => $this->name))->fetchField();
+      $this->vid = $vid ? $vid : NULL;
+    }
 
     $transaction = db_transaction();