Newest toolchain is bitchier, so I wanted to go ahead and clear up all
of the warnings from building GLdc and the various examples...
1) Set CMake CXX standard to 14 instead of 11, since CXXFLAGS were
enforcing that language standard anyway.
2) Fixed a bunch of strict aliasing violations in immediate.c: glVertex3f.
3) Removed or commented out lots of unused variables.
4) Fixed some "suggested inner braces on initializer" crap.
5) Fixed a bunch of signed vs unsigned pointer assignments.
6) Fixed several printf() warnings from using %d with int32_t (needs to
be %ld for long int).
7) Fixed build issue with Nehe20 from not including kos.h for the
KOS_ROMDISK macro.
8) Fixed some signed vs unsigned comparison mismatches in C++ template
instantiations within clipping tests.
9)
