Use a seq rather than tl for I/O stream list (fixes #139)

Using a tl here was convenient but meant that the tokens we were mapping to
were integer constants. These are not the same as the values which get
stored in the allocation list, which just uses 'normal' integers.


git-svn-id: http://www.latex-project.org/svnroot/experimental/trunk@4432 de43f980-851b-0410-b2f7-c40aca1f87e0
Use more efficient \seq_map_inline:Nn in place of \seq_map_function:NN

This gains us a little speed, and nothing is expandable here so is worth it.


git-svn-id: http://www.latex-project.org/svnroot/experimental/trunk@4433 de43f980-851b-0410-b2f7-c40aca1f87e0