Bugfix: Fix deletion of .1 files for NoExtract type

Bugfix: Fix deletion of .1 files for NoExtract type

The NoExtract type failed to delete files that were produced during the
repair stage. These files typically end with the extension ".1". This patch
updates the update_matches() function to handle this case.

Note that it is possible that other sets will have this problem, in which
case this patch could be ported to the PAR2Set.Base.Base class, but I have
never seen such a case in the wild.

Signed-off-by: Ira W. Snyder <devel@irasnyder.com>