status_warning() uses uninitialized status argument

[Alexandre Oliva <aoliva at redhat dot com>]

On Tru64 4.0, using `cc' as the bootstrap compiler, the latest few GCC
snapshots won't build.  The problem is that, if ANSI_PROTOTYPES are
not available, *status is used before status is initialized.  This
patch fixes the problem.  Ok to install?

Index: gcc/ChangeLog
from  Alexandre Oliva  <aoliva@redhat.com>

	* c-common.c (status_warning) [! ANSI_PROTOTYPES]: Load status
	from va_list before using it.

Index: gcc/c-common.c
===================================================================
RCS file: /cvs/gcc/egcs/gcc/c-common.c,v
retrieving revision 1.195
diff -u -p -c -d -r1.195 c-common.c
*** gcc/c-common.c 2000/11/27 05:00:05 1.195
--- gcc/c-common.c 2000/11/29 08:30:15
*************** status_warning VPARAMS ((int *status, co
*** 2021,2044 ****
    va_list ap;
    diagnostic_context dc;
  
!   if (status)
!     *status = 1;
!   else
!     {
!       VA_START (ap, msgid);
  
  #ifndef ANSI_PROTOTYPES
!       status = va_arg (ap, int *);
!       msgid = va_arg (ap, const char *);
  #endif
  
        /* This duplicates the warning function behavior.  */
        set_diagnostic_context
  	(&dc, msgid, &ap, input_filename, lineno, /* warn = */ 1);
        report_diagnostic (&dc);
- 
-       va_end (ap);
      }
  }
  
  /* Variables used by the checking of $ operand number formats.  */
--- 2021,2044 ----
    va_list ap;
    diagnostic_context dc;
  
!   VA_START (ap, msgid);
  
  #ifndef ANSI_PROTOTYPES
!   status = va_arg (ap, int *);
!   msgid = va_arg (ap, const char *);
  #endif
  
+   if (status)
+     *status = 1;
+   else
+     {
        /* This duplicates the warning function behavior.  */
        set_diagnostic_context
  	(&dc, msgid, &ap, input_filename, lineno, /* warn = */ 1);
        report_diagnostic (&dc);
      }
+ 
+   va_end (ap);
  }
  
  /* Variables used by the checking of $ operand number formats.  */

-- 
Alexandre Oliva   Enjoy Guarana', see http://www.ic.unicamp.br/~oliva/
Red Hat GCC Developer                  aoliva@{cygnus.com, redhat.com}
CS PhD student at IC-Unicamp        oliva@{lsd.ic.unicamp.br, gnu.org}
Free Software Evangelist    *Please* write to mailing lists, not to me