C++ Leaking on Windows

[James Inkster]

We've been seeing leaks via CRT debugging in our application (which uses M95, same results with M97 tho).

We've reproduced them with the peerconnection_client example, which seemingly proves the leaks are coming from the library and not our own code.

This can be seen by:

1. apply the attached patch (CRT flags) to the examples code

2. build in debug

3. run the peerconnection_client example (with or without windbg connected)

4. shutdown the example

This should show several leaks.

I've attached the output, and the very small patch.

Any help greatly appreciated!

james