* Mark WTSVirtualChannelOpen and WTSVirtualChannelOpenEx with
WINPR_ATTR_MALLOC to enforce compiler checks for resource cleanup
* Fix unused result warnings, use the result or cast to (void) where not
requierd
The mouse cursor channel enables remoting of the mouse cursor (bitmap)
over a DVC. The main use case is UDP, as only virtual channels can be
transported via UDP in RDP.
