patch 8.1.0240: g:actual_curbuf set in wrong scope

Problem:    g:actual_curbuf set in wrong scope. (Daniel Hahler)
Solution:   Prepend the "g:" name space. (closes #3279)
diff --git a/src/version.c b/src/version.c
index bd8da20..c3b7add 100644
--- a/src/version.c
+++ b/src/version.c
@@ -795,6 +795,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    240,
+/**/
     239,
 /**/
     238,