updated for version 7.4.666

Problem:    There is a chance that Vim may lock up.
Solution:   Handle timer events differently. (Aaron Burrow)

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    666,
 /**/
     665,
 /**/