patch 8.0.1489: there is no easy way to get the global directory

Problem:    There is no easy way to get the global directory, esp. if some
            windows have a local directory.
Solution:   Make getcwd(-1) return the global directory. (Andy Massimino,
            closes #2606)
diff --git a/src/version.c b/src/version.c
index eb0c02a..ccc1066 100644
--- a/src/version.c
+++ b/src/version.c
@@ -772,6 +772,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1489,
+/**/
     1488,
 /**/
     1487,