Fix ServiceClients' ability to call ROS services
Fix ServiceClients' ability to call ROS services

Revert "Socket: Polling: delay zeroing revents and unlocking the socket's poll mutex until inside the EndInvoke callback"

This reverts commit 82fd759eeab8863fb9df141479adef33942c0836.

Conflicts:
	ROS_Comm/Socket.cs

beanstalk42/ROS.NET,uml-robotics/ROS.NET