Do not report a canceled install as failed

When a mod install reached the point of checking for overwrites with
existing mods (i.e., new mod has the same name as an old mod), there
was no way to distinguish between a failure and a user cancellation.
Now, an explicit status is passed up the stack so the cancellation
can be safely ignored by error checking code.

0 files changed, 0 insertions, 0 deletions