Linux: Fix -fPIC linker error with MGL. It now contains C sources so add -fPIC also to C_FLAGS.
OgreMeshAsset: stdexcept includes std errors that inherit std::exception. Seems there is no ctor for 'what' string in linux. Move to using runtime_error that seems to be the best fit.
Fix cppcheck warning: 'VertexBoneAssignment::weight' is not initialized in the constructor.
Fix more uninitialized variables in ctor.
Merge remote-tracking branch 'origin/master' into http
Http: Fix cppcheck warnings.