You will also have to update xaudio2_7/xaudio_dll.c to reflect this change.
dlls/kernel32/i386-windows/libkernel32.a dlls/ntdll/i386-windows/libntdll.a -Wl,--disable-stdcall-fixup ../wine/dlls/xaudio2_7/xaudio_dll.c:1390:5: warning: initialization of ‘HRESULT (__attribute__((stdcall)) *)(IXAudio2MasteringVoice *, DWORD *)’ {aka ‘long int (__attribute__((stdcall)) *)(IXAudio2MasteringVoice *, long unsigned int *)’} from incompatible pointer type ‘void (__attribute__((stdcall)) *)(IXAudio2MasteringVoice *, DWORD *)’ {aka ‘void (__attribute__((stdcall)) *)(IXAudio2MasteringVoice *, long unsigned int *)’} [-Wincompatible-pointer-types] 1390 | XA2M_GetChannelMask | ^~~~~~~~~~~~~~~~~~~