win32: fix bb_get_last_path_component_nostrip()

Finding the last component of a path didn't properly handle a
mixture of slashes and backslashes, paths relative to another
drive or bare UNC paths.  The following were incorrect:

   $ basename /dir\\file
   dir\file
   $ basename c:file
   c:file
   $ basename //HOST/share
   share

With this patch the results are now:

   $ basename /dir\\file
   file
   $ basename c:file
   file
   $ basename //HOST/share
   //HOST/share

0 files changed, 0 insertions, 0 deletions