user32:input.c fails only when run from make?!

[Dan Kegel]

Here's an odd one.  On my Levnovo x60 running Hardy,
with or without metacity-2.23.8 built from source,
the user32 test input.c fails when run from make
nearly all of the time, but doesn't fail if run standalone.
The problem persists even with a trivial makefile, e.g.

foo.ok:
        env WINETEST_DEBUG=1 WINETEST_PLATFORM=wine ~/wine-git/wine
user32_test.exe.so input.c && touch foo.ok

This usually fails with

input.c:648: Test failed: 49: a1 from 00 -> 00 instead of 00 -> 80
or