updated for version 7.4.031
Problem:    ":diffoff!" resets options even when 'diff' is not set. (Charles
            Cooper)
Solution:   Only resets related options in a window where 'diff' is set.
diff --git a/src/version.c b/src/version.c
index 272940a..b07e269 100644
--- a/src/version.c
+++ b/src/version.c
@@ -739,6 +739,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    31,
+/**/
     30,
 /**/
     29,