patch 7.4.888

Problem:    The OptionSet autocommands are not triggered from setwinvar().
Solution:   Do not use switch_win() when not needed. (Hirohito Higashi)

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    888,
 /**/
     887,
 /**/