Updated base64 patches

I have uploaded two new base64 patches, one which uses the flat repository and one which doesn't:

ftp://ftp.kernel.org/pub/linux/kernel/people/hpa/git-0.04-base64-3.diff ftp://ftp.kernel.org/pub/linux/kernel/people/hpa/git-0.04-base64-flat-3.diff

... both are still against the git-0.04 tarball.

The only differences is changing "char" to "signed char" in places where it actually matters (since plain char is unsigned on some platforms), and, for the non-flat version, allowing the cache subdirectories to be lazily created (if ENOENT is returned, try mkdir before giving up.)

	-=hpa