Fix for 'compiling' IDL files

[Robert Shearman]

I couldn't get any IDL files to 'compile' without this fix. REFIID and
others are defined in wtypes when included by WIDL, so it is not necessary
to #define them here.

Changelog:
- Don't #define REFIID and others when included by WIDL

Rob
-------------- next part --------------
Index: guiddef.h
===================================================================
RCS file: /home/wine/wine/include/guiddef.h,v
retrieving revision 1.5
diff -u -r1.5 guiddef.h
--- guiddef.h	31 May 2002 23:06:48 -0000	1.5
+++ guiddef.h	20 Jun 2003 15:29:19 -0000
@@ -54,7 +54,7 @@
 #define REFCLSID            const CLSID &
 #define REFIID              const IID &
 #define REFFMTID            const FMTID &
-#else /* !defined(__cplusplus) && !defined(CINTERFACE) */
+#elif !defined(__WIDL__) /* !defined(__cplusplus) && !defined(CINTERFACE) */
 #define REFGUID             const GUID* const
 #define REFCLSID            const CLSID* const
 #define REFIID              const IID* const