PATCH: fix argument promotion

[John David Anglin]

> The C changes are OK, but can you please add a testcase for this to the C 
> testsuite if one isn't there already, rather than relying on Fortran to 
> show the problem up?  Someone else will need to review the C++ changes.

The testcase that I have is below.  Not sure where or how is should be
hooked into the testsuite.

Dave
-- 
J. David Anglin                                  dave.anglin@nrc.ca
National Research Council of Canada              (613) 990-0752 (FAX: 952-6605)

#include <stdbool.h>

int f (int a, int b, int c, _Bool d, _Bool e, _Bool f, char g)
{
  if (g != 1 || d != true || e != true || f != true) abort ();
  return a + b + c;
}

main ()
{
  exit (f (1, 2, -3, true, true, true, '\001'));
}