updated for version 7.3.589
Problem:    Crash when $HOME is not set.
Solution:   Check for a NULL pointer. (Chris Webb)
diff --git a/src/version.c b/src/version.c
index 2676fa7..0acbce0 100644
--- a/src/version.c
+++ b/src/version.c
@@ -715,6 +715,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    589,
+/**/
     588,
 /**/
     587,