GDC with later DMD's

[Anders F Björklund]

> Ran into some kind of error with "gcc/d/dmd/expression.c":
> {standard input}:26:FATAL:Symbol __ZN10IntegerExp1tE already defined.

Looks like it was a botched macro integration from upstream...

Will bugreport the "mars.h" header file from DMD to Bugzilla,
but here's the trivial patch needed for the gdc-Ego snapshot:

--- gcc/d/dmd/mars.h.orig    Sat Apr 29 04:56:03 2006
+++ gcc/d/dmd/mars.h Sun Apr 30 00:45:13 2006
@@ -131,7 +131,6 @@

  #ifdef __DMC__
  typedef _Complex long double complex_t;
-#elif IN_GCC
  #else
  #ifndef IN_GCC
  #include "complex_t.h"

It wasn't defining the "integer_t" type properly on __APPLE__
(integer_t is a system type, so it uses dmd_integer_t instead)

--anders