Use FATAL_EXIT_CODE rather than hardcoded 1 for fatal error.

From-SVN: r6079

gcc/bi-lexer.c

@@ -38,7 +38,7 @@ xmalloc (nbytes)
   if (!tmp)
     {
       fprintf (stderr, "can't allocate %d bytes (out of virtual memory)\n", nbytes);
-      exit (1);
+      exit (FATAL_EXIT_CODE);
     }
 
   return tmp;
@@ -60,7 +60,7 @@ xrealloc (block, nbytes)
   if (!tmp)
     {
       fprintf (stderr, "can't reallocate %d bytes (out of virtual memory)\n", nbytes);
-      exit (1);
+      exit (FATAL_EXIT_CODE);
     }
 
   return tmp;

gcc/bi-parser.y

@@ -164,5 +164,5 @@ yyerror (s)
      char *s;
 {
   fprintf (stderr, "syntax error in input\n");
-  exit (1);
+  exit (FATAL_EXIT_CODE);
 }