FIX #626: dbObject not finding relations (#667)

dbObject.php

@@ -383,7 +383,7 @@ class dbObject {
      * @return dbObject
      */
     private function with ($objectName) {
-        if (!property_exists ($this, 'relations') && !isset ($this->relations[$name]))
+        if (!property_exists ($this, 'relations') || !isset ($this->relations[$objectName]))
             die ("No relation with name $objectName found");
 
         $this->_with[$objectName] = $this->relations[$objectName];