Don't define ASCII char constants if USE_XPDEV is defined.

xtrn/sdk/xsdkdefs.h

@@ -42,6 +42,10 @@
 /* Macros */
 /**********/
 
+#ifdef USE_XPDEV
+	#include "gen_defs.h"
+#else
+
 									/* Control characters */
 #define STX 	0x02				/* Start of text			^B	*/
 #define ETX 	0x03				/* End of text				^C	*/
@@ -53,6 +57,8 @@
 #define ESC 	0x1b				/* Escape					^[	*/
 #define SP      0x20                /* Space                        */
 
+#endif
+
 
 #define DCD    0x8000		/* Data carrier detect bit in msr			*/