patch 8.2.3988: tiny build fails

Problem:    Tiny build fails.
Solution:   Fix misplaced #ifdef.
diff --git a/src/version.c b/src/version.c
index 3403fda..21e11dc 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3988,
+/**/
     3987,
 /**/
     3986,