Rune - Fix interpreter array index typing

Rune - Fix interpreter array index typing

* Use ex_Run64 for RunAryExp() and RunAddrAryExp().  Also,
  RunAddrAryExp() was previously assuming a 32-bit array index.
  This also fixes that.

* Fix a bug in RunCachedConstantExp() when processing unsigned
  integers.  We were testing TF_ISINTEGER before TF_ISUNSIGNED.
  But TF_ISINTEGER also covers TF_ISUNSIGNED.  Process TF_ISUNSIGNED
  first.

* Optimize content adjustments for arrays.  Only iterate the array
  if its content contains the capabilities being adjusted.

* Code cleanup.