Blender Git Loki

Some more compile fixes for jaguarandi's commit, this time for msvc+scons

* Replaced ... = {}; with ... = {0};

* Solved problem with logf(), where msvc couldn't figure out which version of log() to call (solved by casting the int argument to a float, but could also have been to double)...

* The cflags and cxxflags for scons when compiling the rendering module were only valid for gcc compiles. These will still need to get added for msvc sometime, but for now, there are no more warnings about unknown options...