[Ohrrpgce] SVN: james/9157 Improve killdir error checking. Trying to killdir an ordinary file produ

[subversion at HamsterRepublic.com]

james
2017-08-22 13:05:26 -0700 (Tue, 22 Aug 2017)
393
Improve killdir error checking. Trying to killdir an ordinary file produces a more specific error message,
and trying to killdir a non-existing directory does a debug log warning, but no visible error.
(This fixes the spurious warning when distributing a Mac app while it premetively cleans up an old copy of OHRRPGCE-Game.app that is usually not left behind (unless the previous run failed?))
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U   wip/util.bas