updated for version 7.4.666
Problem:    There is a chance that Vim may lock up.
Solution:   Handle timer events differently. (Aaron Burrow)
diff --git a/src/version.c b/src/version.c
index a9b8043..f9b47b1 100644
--- a/src/version.c
+++ b/src/version.c
@@ -742,6 +742,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    666,
+/**/
     665,
 /**/
     664,