patch 9.0.1442: mapset() does not restore non-script context

Problem:    mapset() does not restore non-script context.
Solution:   Also accept negative sid. (closes #12132)
diff --git a/src/version.c b/src/version.c
index 856eb46..192d582 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1442,
+/**/
     1441,
 /**/
     1440,