added a forward declaration to _DRIVE_LAYOUT_INFORMATION(_EX). this fixes building io/disk.c with GCC4. The reason is that the structures were used in function prototypes, which are forward declarations in the scope of the function declaration only. Since the structures were defined later, the implementations of the functions using them, actually used the defined structure types, which were different from the forward declarations in the function prototypes (even though they have the same name, they just differ in their scope). This caused GCC to warn because of incompatible function prototypes and incompatible pointer types passed to those functions

Modified: trunk/reactos/w32api/include/ddk/winddk.h

--- trunk/reactos/w32api/include/ddk/winddk.h	2005-07-29 13:28:34 UTC (rev 16858)
+++ trunk/reactos/w32api/include/ddk/winddk.h	2005-07-29 13:28:37 UTC (rev 16859)
@@ -101,6 +101,8 @@

 struct _IO_STATUS_BLOCK;
 struct _DEVICE_DESCRIPTION;
 struct _SCATTER_GATHER_LIST;

+struct _DRIVE_LAYOUT_INFORMATION;
+struct _DRIVE_LAYOUT_INFORMATION_EX;

 
 DECLARE_INTERNAL_OBJECT(ADAPTER_OBJECT)
 DECLARE_INTERNAL_OBJECT(DMA_ADAPTER)