patch 8.1.0285: compiler warning for conversion

Problem:    Compiler warning for conversion.
Solution:   Add a type cast. (Mike Williams)
diff --git a/src/version.c b/src/version.c
index 18051fa..876fcf3 100644
--- a/src/version.c
+++ b/src/version.c
@@ -795,6 +795,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    285,
+/**/
     284,
 /**/
     283,