--- deldiff.vim.orig	2006-02-11 20:23:09 +0500
+++ deldiff.vim	2007-02-22 22:57:23 +0500
@@ -28,6 +28,11 @@
 " deleted too
 " 
 
+if !exists("use_deldiff_plugin")
+    finish
+endif
+
+
 function! DelDiffBlock()
   " search backward
   let start_line = line ( '.' )