Check min and max to determine truth value of condition

Also added some min/max values for a few functions.

This allows optimizing things like:

  ! llGetNumberOfPrims()  ->  0

unit_tests/regression.suite/boolexpr.lsl

@@ -4,7 +4,10 @@ if (llSameGroup(llGetOwner()) && llDetectedGroup(0)) llDie();
 
 // TODO
 // llGetEnergy() has min=0 and max=1, therefore (integer)llGetEnergy() is bool,
-// however we don't yet handle it.
+// however we don't handle it yet (needs min and max applied to expressions).
 if ((integer)llGetEnergy() && llSameGroup(llGetOwner())) llDie();
 
+// Check that min and max work as they should. This is always true.
+if (llGetNumberOfPrims()) llDie();
+
 }}

unit_tests/regression.suite/boolexpr.out

@@ -6,5 +6,6 @@ default
             llDie();
         if ((integer)llGetEnergy() & -llSameGroup(llGetOwner()))
             llDie();
+        llDie();
     }
 }