growing process size in simulation

Thanks for looking into this, Luke. Yes, I agree. Specifically, the
issue seems to be that we used to work off a static variable "buff"
and use realloc on that inside AllocBuffer if it was non-null. Now
we've put the variable inside a structure "buf->data" and still trying
to use the realloc'ing construct, but since "buf" (aka localData) is a
local variable, it gets NULL'ed every time deparse1WithCutoff() is
called ---> deparse1WithCutoff needs to clean up on the way out.

Right.  Unfortunately the issue goes beyond deparse.c.
R_AllocStringBuffer is also called in printutils.c, saveload.c,
scan.c.  I'm not sure about printutils.c, but the others look like
they have the same issue.  R_LoadFromFile in saveload.c looks like a
particular pain to fix; perhaps moving the buffer allocation up one
call level would work.  I can try to fix this later next week unless
someone else gets there first.

I wonder if there is something we could add to the QA tools that could
have picked this up.