Counting inventory does not work for goal criteria

[kostmo]

Added test cases in #859 to demonstrate.

[kostmo]

As demonstrated in #926, the following does not work as condition code:

x <- has "tree"; not x

However, for multi-objective scenarios, #795 provides a workaround by defining a NOT prerequisite.

[xsebek]

I wonder if this is a minimal example - i.e. if not false works as a condition.

EDIT: My minimal example so far:

as base {
  x <- scan down; // <----- any BIND will do!
  return true; // <--- anything here including multiple commands
}

[xsebek]

The problem is with the kind of value returned from the hypothetical condition check: