tree bcb2fc65b934d3e6904286bf69fb0b8e2f52b9ea
parent e92ceebde0034ad045e12b8241045d701383e681
author Shawn O. Pearce <sop@google.com> 1229097672 -0800
committer Shawn O. Pearce <sop@google.com> 1229097672 -0800

Don't accept multiple commits for the same change in upload --replace

Gerrit won't permit more than one commit using the same change
number during a replacement request, so we should error out if
the user has asked for this in their upload edit script.

Signed-off-by: Shawn O. Pearce <sop@google.com>