patch 8.2.0530: test crashes on s390

Problem:    Test crashes on s390. (James McCoy)
Solution:   Explicitly define an 8 big signed type. (closes #5897)
diff --git a/src/version.c b/src/version.c
index a3c54cb..2caae75 100644
--- a/src/version.c
+++ b/src/version.c
@@ -739,6 +739,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    530,
+/**/
     529,
 /**/
     528,