patch 8.2.5135: running configure gives warnings for main() return type

Problem:    Running configure gives warnings for main() return type.
Solution:   Specify "int" return type.  Avoid a few more warnings.
diff --git a/src/version.c b/src/version.c
index 2c0a1ec..c945a2b 100644
--- a/src/version.c
+++ b/src/version.c
@@ -735,6 +735,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    5135,
+/**/
     5134,
 /**/
     5133,