patch 9.0.0080: compiler warning for size_t to int conversion

Problem:    Compiler warning for size_t to int conversion.
Solution:   Add type casts. (Mike Williams, closes #10795)
diff --git a/src/version.c b/src/version.c
index bd75074..50bf7c4 100644
--- a/src/version.c
+++ b/src/version.c
@@ -736,6 +736,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    80,
+/**/
     79,
 /**/
     78,