hiperpret should count the number of variables in the dconf dicts

[Sword-Smith]

Currently, the number of variables (keys) in the dconf dicts are not counted when the locked_var variable is used to pick the relevant dconf dicts in the function "get_2d_points_dconf_dicts". This means that the user can think that he has locked down all but the free variable but that he actually has more than one free variable. This would leave to more than one y value for each x value in that function and this is undefined behavior (read: I am currently too lazy to figure out what would happen).

This should probably be fixed by counting the variables and the locked variables in an if-statement in this function. A check that each x-val only has one y-val might also be a possibility.