Since the modular backend implements abstract modules to be written in the future which _may_ have interdependencies, they should be set to null pointers after deletion.
This allows assert(_eventManager) type lines to work, which would have detected bug #3121841 without a segfault...
Also, _fsFactory should be deleted to ensure it is not leaked though this causes a group of GCC warnings and probably should be done in a different manner.
svn-id: r54580
This fixes a hack for resetting the graphics scale to x1 when starting games that have a large screen size. The SDL graphics manager should now scale back to x1 without changing the current scaler in use, as well as the OpenGL graphics manager.
svn-id: r51492
