ARCHITECTURE_DESC is unused, no need to error out for that.

Index: src/xpdev/genwrap.h
--- src/xpdev/genwrap.h.orig
+++ src/xpdev/genwrap.h
@@ -208,7 +208,7 @@ extern "C" {
 #elif defined(_M_IA64) || defined(__ia64__)
 	#define ARCHITECTURE_DESC "ia64"
 #else
-	#error "Need to describe target architecture"
+	#define ARCHITECTURE_DESC "unknown"
 #endif
 
 /*********************/