[prange] Default pointers_handled_p() to false.

[prange] Default pointers_handled_p() to false.

The pointers_handled_p() method is an internal range-op helper to help
catch dispatch type mismatches for pointer operands.  This is what
caught the IPA mismatch in PR114985.

This method is only a temporary measure to catch any incompatibilities
in the current pointer range-op entries.  This patch returns true for
any *new* entries in the range-op table, as the current ones are
already fleshed out.  This keeps us from having to implement this
boilerplate function for any new range-op entries.

	PR tree-optimization/114995
	* range-op-ptr.cc (range_operator::pointers_handled_p): Default to true.