ofPopStyle sets color to black.

[NickHardeman]

This is because the color values are cast to ints, but they are now floats. https://github.com/openframeworks/openFrameworks/blob/4eade4fdc09678a04d7cbe7f85d2c5c6bc72d0b1/libs/openFrameworks/gl/ofGLProgrammableRenderer.cpp#L1176