[MERGE][trivial] builtins._create_prefix use 'location', give it a parameter, thank you

[Aaron Bentley]

Aaron Bentley has voted -0.
Status is now: Waiting
Comment:
Please try to write a little bit more.  I did not find your explanation 
very clear.

i.e. I did not understand that location was supposed to be a parameter, 
but had not been added.

Also, there should really be a test somewhere.

Also, I'm not clear that location is a required parameter.  Can't you 
use transport.base?

For details, see: 
http://bundlebuggy.aaronbentley.com/request/%3Cm2y7iesnfx.fsf%40free.fr%3E