patch 9.0.1699: compile warning for xdiff/xutils on MS-Windows

Problem: compile warning for xdiff/xutils on MS-Windows
Solution: add explicit type cast from size_t to long

closes: #12531

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: Mike Williams <mikew@globalgraphics.com>
diff --git a/src/version.c b/src/version.c
index 16ebc61..b09052c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1699,
+/**/
     1698,
 /**/
     1697,