Merge branch 'bp/diff-no-index-strbuf-fix' into maint

The directory path used in "git diff --no-index", when it recurses down, was broken with a recent update after v1.7.10.1 release. By Bobby Powers * bp/diff-no-index-strbuf-fix: diff --no-index: don't leak buffers in queue_diff diff --no-index: reset temporary buffer lengths on directory iteration