patch 8.2.3968: build failure

Problem:    Build failure.
Solution:   Add missing changes.
diff --git a/src/version.c b/src/version.c
index 337bcd5..5f9e639 100644
--- a/src/version.c
+++ b/src/version.c
@@ -750,6 +750,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3968,
+/**/
     3967,
 /**/
     3966,