[nongnu] elpa/vc-fossil 9f31709 055/111: Fix diff command if old rev is not specified.

[ELPA Syncer]

branch: elpa/vc-fossil
commit 9f3170907aad6b7276a9982b0520d8b0f7545967
Author: fifr <fifr>
Commit: fifr <fifr>

    Fix diff command if old rev is not specified.
    
    In this case the source revision should be current.
---
 vc/el/vc-fossil.el | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/vc/el/vc-fossil.el b/vc/el/vc-fossil.el
index 692cf9e..4aaabd6 100644
--- a/vc/el/vc-fossil.el
+++ b/vc/el/vc-fossil.el
@@ -279,8 +279,9 @@ If `files` is nil return the status for all files."
     (apply #'vc-fossil-command
            buf 0 file "diff" "-i"
            (nconc
-            (and rev1 (list "--from" rev1))
-            (and rev2 (list "--to" rev2))
+            (cond
+             (rev2 (list "--from" (or rev1 "current") "--to" rev2))
+             (rev1 (list "--from" rev1)))
             (vc-switches 'Fossil 'diff)))))
 
 (defun vc-fossil-annotate-command (file buffer &optional rev)