[PATCH v2] windowscodecs: tiffformat: Fix TiffFrameDecode_GetResolution, add test

[Vincent Povirk]

It doesn't work here.

../../../../tools/runtest -q -P wine -T ../../.. -M windowscodecs.dll
-p windowscodecs_test.exe.so tiffformat && touch tiffformat.ok
_TIFFVSetField: <IStream object>: Bad value 0 for "ResolutionUnit" tag.
_TIFFVSetField: <IStream object>: Bad value 0 for "ResolutionUnit" tag.
_TIFFVSetField: <IStream object>: Bad value 0 for "ResolutionUnit" tag.
_TIFFVSetField: <IStream object>: Bad value 0 for "ResolutionUnit" tag.
tiffformat.c:476: Test failed: 9: x: expected 96.000000 or 58.000000,
got 58.000000
tiffformat.c:492: Test failed: 9: y: expected 96.000000, got inf
tiffformat.c:476: Test failed: 11: x: expected 96.000000 or
127.000000, got 127.000000
tiffformat.c:487: Test failed: 11: y: expected 96.000000 or 243.840000, got inf
Makefile:670: recipe for target 'tiffformat.ok' failed
make: *** [tiffformat.ok] Error 4