Executor code - found an instance of a WHILE that should just be an IF

Hi,

During debugging I noticed some code in ExecResult() where a WHILE
loop is being used with an unconditional RETURN at the end of the
block (which is intentional, looking at the history of changes), but
now there's no actual use of the loop in any way. The code should
probably be changed to just use IF for clarity.
I've attached a patch.

Regards,
Greg Nancarrow
Fujitsu Australia