patch 8.1.1745: compiler warning for unused argument

Problem:    Compiler warning for unused argument.
Solution:   Add UNUSED.  Change comments to new style.
diff --git a/src/version.c b/src/version.c
index df0bc83..e155b39 100644
--- a/src/version.c
+++ b/src/version.c
@@ -778,6 +778,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1745,
+/**/
     1744,
 /**/
     1743,