advpack.c must be compiled with optimization?

[Dan Kegel]

Oddly, if I compile the wine tree without -O2, the following
test fails:

../../../wine advpack_test.exe.so advpack.c
advpack.c:441: Test failed: Expected C:\Program Files, got C:\
advpack.c:443: Test failed: Expected size 17, got 4
make: *** [advpack.ok] Error 2

Compiling advpack/advpack.c with at least -O makes
the problem go away.