qglxconvenience.cpp is built with strict implicit cast flags. Also treat an empty LIBGL_ALWAYS_SOFTWARE as set because Mesa does that, too. (For QT_XCB_FORCE_SOFTWARE_OPENGL, we follow Qt rules, i.e. empty=unset.)
* Wed Jan 29 2014 Kevin Kofler <Kevin@tigcc.ticalc.org> - 5.2.0-10 - fix the allow-forcing-llvmpipe patch to patch actual caller of __glXInitialize
* Wed Jan 29 2014 Kevin Kofler <Kevin@tigcc.ticalc.org> - 5.2.0-9 - use software OpenGL (llvmpipe) if the hardware driver doesn't support OpenGL 2