RegOpenKeyEx doesn’t work

[Hawk777]

RegOpenKeyEx always returns a null HKEYon success. The problem is that a null HKEY is constructed, then hKey.as_ptr() is passed into the raw function, which means it will store the newly opened HKEY into wherever hKey pointed at, which is null, rather than into hKey itself. I changed the function to look like this and it now works, but I imagine raw types like c_void probably aren’t supposed to appear here; I just don’t really quite understand all the type aliases so it was the fastest and simplest fix I could come up with:

	fn RegOpenKeyEx(self, sub_key: &str,
		options: co::REG_OPTION, access_rights: co::KEY) -> SysResult<HKEY>
	{
		let mut hKey: *mut std::ffi::c_void = std::ptr::null_mut();

		match co::ERROR(
			unsafe {
				advapi::ffi::RegOpenKeyExW(
					self.as_ptr(),
					WString::from_str(sub_key).as_ptr(),
					options.0,
					access_rights.0,
					&mut hKey as _,
				)
			} as _,
		) {
			co::ERROR::SUCCESS => Ok(unsafe { HKEY::from_ptr(hKey) }),
			err => Err(err),
		}
	}