Prevent invalid element name (phalcon#12954)

* Prevent invalid element name

Prevent create form element with empty name value like ''

* trim name

* Update element.zep

* Update element.zep

phalcon/forms/element.zep

@@ -58,12 +58,12 @@ abstract class Element implements ElementInterface
 	public function __construct(string name, array attributes = [])
 	{
 		let name = trim(name);
-		
+
 		if empty name {
 			throw new \InvalidArgumentException("Form element name is required");
 		}
-		
-		let this->_name = name;
+
+
 		let this->_attributes = attributes;
 		let this->_messages = new Group();
 	}