Commented some logging that could be '''very''' long, cuts -vv output size of a gtkd gl sample down 1.2GB by 3/4. Fixed wrong pointer type for multidimension "deep" slicing.

module bug66;
import std.stdio;
class Scene { string name() { return "Scene"; } }
class Group : Scene { this () { } }
void main() { writefln((new Group).name); }