Fix redefinition of WINAPI_FAMILY_PARTITION when using MinGW64 (thanks to Henrik Pauli for pointing this).
Fix redefinition of WINAPI_FAMILY_PARTITION when using MinGW64 (thanks to Henrik Pauli for pointing this).

jiangjianping/ortp,Linphone-sync/oRTP,caizw/ortp,VTCSecureLLC/ortp,caizw/ortp,jiangjianping/ortp,Linphone-sync/oRTP,wugh7125/ortp,wugh7125/ortp,Distrotech/oRTP,Distrotech/oRTP,carpikes/ortp,caizw/ortp,jiangjianping/ortp,Distrotech/oRTP,carpikes/ortp,Linphone-sync/oRTP,VTCSecureLLC/ortp,wugh7125/ortp,carpikes/ortp,VTCSecureLLC/ortp