patch 8.1.0217: compiler warning for variable set but not used

Problem:    Compiler warning for variable set but not used.
Solution:   Move tilde_file inside #ifdef. (Hirohito Higashi, closes #3255)
diff --git a/src/version.c b/src/version.c
index 0d0a2b2..dd9e1d4 100644
--- a/src/version.c
+++ b/src/version.c
@@ -799,6 +799,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    217,
+/**/
     216,
 /**/
     215,