Fix initial multi-branch import.
Fix initial multi-branch import.

The list of existing p4 branches in git wasn't initialized.

Signed-off-by: Simon Hausmann <557de780ea7e35794f4cd12cd1c79efe52f1d714@trolltech.com>

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