[PATCH] git-branch: avoid getting confused by empty or nonexisting branches.
[PATCH] git-branch: avoid getting confused by empty or nonexisting branches.

When not specifying the start point explicitly, we ended up
emitting ^0 in addition to the default HEAD.  Be careful to see
if we have "$2" before finding out which commit to base the new
branch on.

Signed-off-by: Junio C Hamano <dc50d1021234060e53ec42a77d526afa2fe07479@cox.net>
Signed-off-by: Junio C Hamano <dc50d1021234060e53ec42a77d526afa2fe07479@cox.net>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git