patch 9.1.0590: Vim9: crash when accessing getregionpos() return value

Problem:  Vim9: crash when accessing getregionpos() return value.
Solution: Correct the return type (zeertzjq).

fixes: #15272
closes: #15273

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/version.c b/src/version.c
index 024ed1a..ae351cf 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    590,
+/**/
     589,
 /**/
     588,