These are already safe because both sides of the comparison are nonnegative. This would normally not be important because Git is not -Wsign-compare clean anyway, but we like to keep the vcs-svn/ lib to a higher standard for convenience using it in other projects. Signed-off-by: David Barr <davidbarr@google.com> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>