[PATCH 0/9] Remove some macros from exec.h and progspace.h

[Tom Tromey]

This series removes some macros from exec.h and progspace.h.  In
particular, macros that hide that some global variable is used are
removed.

I find these macros somewhat obscure.  I think patches #2 and #6 show
why -- it turns out that some code here was easily parameterized and
did not need to use a global, or even save/restore the current program
space.

Let me know what you think.  Like the other series along these lines,
I don't see any need to check them in before the branch is made.

Tom