_M_IX86 is not the same as _X86_ on the most recent PSDK. Define both

Modified: trunk/reactos/ReactOS.xml

--- trunk/reactos/ReactOS.xml	2005-11-22 05:48:48 UTC (rev 19451)
+++ trunk/reactos/ReactOS.xml	2005-11-22 06:22:21 UTC (rev 19452)
@@ -10,6 +10,7 @@

 	<xi:include href="baseaddress.xml" />
 
 	<define name="_M_IX86" />

+	<define name="_X86_" />

 	<if property="MP" value="1">
 		<define name="CONFIG_SMP" value="1" />
 	</if>