patch 8.1.1798: warning for unused variable in tiny version

Problem:    Warning for unused variable in tiny version. (Tony Mechelynck)
Solution:   Move inside #ifdef.  Reformat code.
diff --git a/src/version.c b/src/version.c
index c3af73a..ec67fe4 100644
--- a/src/version.c
+++ b/src/version.c
@@ -774,6 +774,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1798,
+/**/
     1797,
 /**/
     1796,