FMSLogo Code

Fix a regression in CHECKSCREEN that used the wrong file extension for the per-computer reference data.

Update CHECKSRCREEN to be able to read expected values from "referencedata".
This makes setting up a new test machine easier, as the setup won't require manually approving as many expected data files.
This only became worthwhile after integrating bmptestsuite into the tests.

Cleanup: Remove three redundant tests (copy&paste error)

Increase the width,height limits on BMP from 2**15 to 2**16 in wxWidgets.
This enables FMSLogo to load more of the bitmaps from the bitmaptestsuite and has less risk of breaking programs that worked prior to using wxWidgets to load bitmaps.

Fix a recent regression where vbarred strings weren't unvbarred by DLLCALL when given as a "U" argument.

Shorten a comment: "well-known data" -> "known data"

Refactoring: Move the logic for calling GlobalAlloc and GlobalFree into setclipboarddata.lgo.
GlobalAlloc and GlobalFree are useless outside the context of the clipboard and the SETCLIPBOARDDATA is useless without GlobalAlloc and GlobalFree, so it makes sense to put them into the same sample code.

Incorporate a fix for RLE bitmaps that I had provided to the wxWidgets master branch.

Update the patch for imagbmp.cpp to be what I submitted to the wxWidgets master.
This doesn't use exceptions but instead tests that biClrUsed is in a reasonable range.

Refactor test to use SETCLIPBOARDATA from the DLLCALL samples