Calling PrepareTempTablespaces in BufFileCreateTemp

Hi,
PrepareTempTablespaces is called by most callers of BufFileCreateTemp, so I
was
wondering if there is a reason not to call it inside BufFileCreateTemp.

As a developer using BufFileCreateTemp to write code that will create spill
files, it was easy to forget the extra step of checking the temp_tablespaces
GUC to ensure I create the spill files there if it is set.

Thanks,
Melanie Plageman