Message 266090 - Python tracker

I've tracked down the lnotab issue after modifying master/wpy to not vacuum NOPs. Old code puts LOAD_CONST at after NOPs, on the same line as return op, whereas new code is putting LOAD_CONST before NOPs, on it's own line

I've attached a fix along with addressing compiler warnings & __phello__ & adding some asserts that make sure we aren't passing indices that point inside instructions to peephole's helper functions