Possible regression in master? (submodules without a "master" branch)

Hi,

I just found a failure to checkout a project with submodules where there is no explicit submodule branch configuration, and the submodules happen to not have a "master" branch:

  git clone git://gitorious.org/qt/qt5.git qt5
  cd qt5
  git submodule init qtbase
  git submodule update

In current master, the last command fails with the following output:

  Cloning into 'qtbase'...
  remote: Counting objects: 267400, done.
  remote: Compressing objects: 100% (61070/61070), done.
  remote: Total 267400 (delta 210431), reused 258876 (delta 202642)
  Receiving objects: 100% (267400/267400), 136.23 MiB | 6.73 MiB/s, done.
  Resolving deltas: 100% (210431/210431), done.
  Checking connectivity... done.
  error: pathspec 'origin/master' did not match any file(s) known to git.
  Unable to setup cloned submodule 'qtbase'

Bisection points to 23d25e48f5ead73c9ce233986f90791abec9f1e8 (W. Trevor King: submodule: explicit local branch creation in module_clone). Looking at the patch, it seems to introduce an implicit assumption on the submodule origin having a "master" branch. Is this an intended change in behaviour?

...Johan