Panda 1.9 (dev) on Win 7 x64

Just for the record, I checked in some changes for 1.10 that make us no longer call any Cg functions at initialization, but only when the first Cg shader is compiled. This should at least safeguard those applications that don’t use Cg from this crash, and if it does occur it will occur when loading a Cg shader, giving a clue what the problem might be if it happens for others.