Stop breaking trees when submodules are encountered
For projects that contain submodules, ls-tree also lists the commits of
these, like:
dennis@lightning:~/code/Diamond$ git ls-tree HEAD
100644 blob
76548fb89c2c220d43759b40848600a16cfe65ea .gitignore
100644 blob
c2c5e7f9ad41d2a6bf49dcfe2a18c67f1b7264d3 .gitmodules
100644 blob
159d72c1edf6e0e227b0c1dda86aa08c307468df LICENSE
100644 blob
3ce75ca4a98adbc6b1cdf68797b6b9328bf112cc MANIFEST.in
100644 blob
588e2ba64d1968ecf949325cab4b1bfaf60caf75 Makefile
100644 blob
974a51cd30c73dc4fa5083252902b5596cbdeec8 README.md
040000 tree
e69b70cc3f14491f167b3edd1561279344267b89 bin
040000 tree
10b76bbf7f6900e53916bf52c651b048569de46c conf
040000 tree
90be53cbef1f3b6167a2b24f59365e94ce6cd989 debian
160000 commit
69c721d6d71b1a471e945bf680773467ee2c551e docs
040000 tree
daa6b06e1917938c2e939bbcd1d7b451e290b680 rpm
100644 blob
9046e2354860cb14b2ade3159c20e5245013a238 setup.cfg
100755 blob
0a4a2748cc2bb61685d5535d5a6557854153e7c0 setup.py
040000 tree
4b95cf8a722b456382abbd025476c87f87a97043 src
100644 blob
a375d7dbdb98e15dc5021c0c5e4cb9757fcc0273 test.py
100644 blob
13f3e59423a6f49d89527b9e9a2050fb79d0025f test.watchr
Gitalist would choke on those because these commits are commits from the
submodule's repository, not itself. So we should ignore them.
projects / catagits/Gitalist.git / commit