Threading issues related to second window

[m9dfukc]

Hi,

I'm experiencing threading issues related to a second openframeworks window. I have setup a simple example on gist. The application erratically crashes when running in release mode, resulting in the following error:

OpenCV Error: Assertion failed (0 <= roi.x && 0 <= roi.width && roi.x + roi.width <= m.cols && 0 <= roi.y && 0 <= roi.height && roi.y + roi.height <= m.rows) in Mat, file ... /opencv/modules/core/src/matrix.cpp, line 323

[ fatal ] ofThreadErrorLogger::exception: ... /opencv/modules/core/src/matrix.cpp:323: error: (-215) 0 <= roi.x && 0 <= roi.width && roi.x + roi.width <= m.cols && 0 <= roi.y && 0 <= roi.height && roi.y + roi.height <= m.rows in function Mat

[m9dfukc]

Might be related to issue #20 ?!