fix for mingw build (ortp-config.h must be included)
fix for mingw build (ortp-config.h must be included)

Distrotech/oRTP,VTCSecureLLC/ortp,samueljero/linphone-oRTP,carpikes/ortp,dozeo/ortp,dmonakhov/ortp,carpikes/ortp,wugh7125/ortp,samueljero/linphone-oRTP,Linphone-sync/oRTP,caizw/ortp,wugh7125/ortp,jiangjianping/ortp,jiangjianping/ortp,avis/ortp,videomedicine/oRTP,avis/ortp,dmonakhov/ortp,videomedicine/oRTP,jiangjianping/ortp,dmonakhov/ortp,VTCSecureLLC/ortp,Linphone-sync/oRTP,dozeo/ortp,VTCSecureLLC/ortp,dozeo/ortp,Linphone-sync/oRTP,Distrotech/oRTP,carpikes/ortp,caizw/ortp,wugh7125/ortp,caizw/ortp,videomedicine/oRTP,Distrotech/oRTP,samueljero/linphone-oRTP,avis/ortp