patch 8.2.2270: warning for size_t to int conversion

Problem:    Warning for size_t to int conversion. (Randall W. Morris)
Solution:   Add a type cast.
diff --git a/src/version.c b/src/version.c
index 25d464b..c1e7986 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2270,
+/**/
     2269,
 /**/
     2268,