Dominator Analysis

Hello, I've made a small patch including my dominator analysis. It is ugly. It is the first time I did something with python embedded in C, so I'm aware I did not use the best practices. I inserted all my changes inside the gcc-python.c If you could check my patch and suggest some changes I'd be happy to do them before re-submitting my patch. -- Emilio Wuerges ECL - Embedded Computing Lab UFSC - Universidade Federal de Santa Catarina Brasil