Merge branch 'jk/cat-file-regression-fix'

"git cat-file --batch=", an admittedly useless command, did not
behave very well.

* jk/cat-file-regression-fix:
cat-file: handle --batch format with missing type/size
cat-file: pass expand_data to print_object_or_die

diff --cc t/t1006-cat-file.sh
Simple merge