Some tools for D - necessary bugfix

[Downs]

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I made a rather stupid mistake in ifIs that would make the program crash
hard. Sorry. Here's the patch for the fixed version against the original
post (also includes the other patch).
Also, just to make it clear - I don't think any of this stuff is
copyrightable on account of being too trivial. So take what you need.
 --downs
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iD8DBQFGzVhSpEPJRr05fBERAv4TAJ9phEOvzG1xyozrvdIrexijW8eb/wCeKp3t
EwG2Gr9+9qLD9TlavbeEOT4=
=JW2B
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