Index: core/kernel/utility/http_query.php
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- core/kernel/utility/http_query.php	(revision 15682)
+++ core/kernel/utility/http_query.php	(revision )
@@ -797,6 +797,6 @@
 			}
 		}
 
-		return $_SERVER['REMOTE_ADDR'];
+		return isset($_SERVER['REMOTE_ADDR']) ? $_SERVER['REMOTE_ADDR'] : '';
 	}
 }
\ No newline at end of file