vcs-svn: rename check_overflow arguments for clarity
vcs-svn: rename check_overflow arguments for clarity

Code using the argument names a and b just doesn't look right (not
sure why!).  Use more explicit names "offset" and "len" to make their
type and meaning clearer.

Also rename check_overflow() to check_offset_overflow() to clarify
that we are making sure that "len" bytes beyond "offset" still fits
the type to represent an offset.

Signed-off-by: Jonathan Nieder <b57189c5f2fd5b3daf3350a77fde90def1080fa5@gmail.com>
Signed-off-by: Junio C Hamano <a6723cc3f76163bf7adb636a73ac3b0ceb3e6b9b@pobox.com>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git