[PATCH] Fix possible overflow with very large files in libsvn_delta

Hi,

This is my first contribution so please react friendly on my possible
ignorance to your contribution rules :-)

When building TortoiseSVN, I noticed some compiler warnings when building
some of the SVN libraries. I looked closer at them and found a possible
problem in libsvn_delta. There is some piece of code that stores stream
offsets in a apr_size_t variable. This might fail on systems that support
very large files (64 bit file offsets stored in a 32 bit integer). The fix
was easy and I just replaced apr_size_t with svn_file_size at two places.

When you decide this all is complete nonsense than please ignore this
posting!

Norbert

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Fix possible overflow with very large files in libsvn_delta

* subversion/libsvn_delta/text_delta.c
  (struct tpush_baton, compute_window): source_offset changed
  from apr_size_t to svn_file_size.

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