Bug-report: aligment of vtable is greater, that maximum object file aligment

[Jeffrey A Law]

  >  * c-pragma.c (handle_pragma_token): Test for null tree before 
  >    dereferencing TREE_CODE.
Seems good.

  > Please try this patch to sco5.h.  You'll have to rebuild varasm.o and
  > let it rebuild cc1plus.  I can't test that this actually WORKS or is
  > even necessary; only that it avoids the warning and results in code
  > that'll still assemble in both COFF and ELF.  Since this isn't triggered
  > by the testsuites, I'll have to rely on you to tell me if this patch
  > makes things better or worse for you.
  > 
  >  * sco5.h (MAX_OFILE_ALIGNMENT): Define as in svr4.h
Probably good, but I'll let you decide.

jeff