createpool: Raise validation error if no name specified

virtManager/createpool.py

@@ -473,6 +473,10 @@ class vmmCreatePool(vmmGObjectUI):
         return pool
 
     def _validate_page_name(self, usepool=None):
+        name = self.get_config_name()
+        if not name:
+            return self.err.val_err(_("A name must be specified."))
+
         try:
             if usepool:
                 self._pool = usepool