gdi32/tests: Fix an uninitialized pointer check for Win64.
[wine] / dlls / avicap32 / avicap32.spec
1 @ stdcall capCreateCaptureWindowA(str  long long long long long long long)
2 @ stdcall capCreateCaptureWindowW(wstr long long long long long long long)
3 @ stdcall capGetDriverDescriptionA(long ptr long ptr long)
4 @ stdcall capGetDriverDescriptionW(long ptr long ptr long)