Fixing undefined variable warnings from copyToFromRaw(), which have been

piling up in error logs (not displayed because of being during submit
phase).

components/com_fabrik/models/form.php

@@ -2139,17 +2139,17 @@ protected function copyToFromRaw(&$post, $direction = 'toraw', $override = false
 					if (!array_key_exists($elName2Raw, $post) || $override)
 					{
 						// Post required getValue() later on
-						$input->set($elName2Raw, @$post[$elName2]);
-						$post[$elName2Raw] = @$post[$elName2];
+						$input->set($elName2Raw, FArrayHelper::getValue($post, $elName2, ''));
+						$post[$elName2Raw] = FArrayHelper::getValue($post, $elName2, '');
 					}
 				}
 				else
 				{
 					if (!array_key_exists($elName2 . '_raw', $post) || $override)
 					{
 						// Post required getValue() later on
-						$input->set($elName2, @$post[$elName2Raw]);
-						$post[$elName2] = @$post[$elName2Raw];
+						$input->set($elName2, FArrayHelper::getValue($post, $elName2Raw, ''));
+						$post[$elName2] = FArrayHelper::getValue($post, $elName2Raw, '');
 					}
 				}
 			}