Added comment regarding extended keys to help avoid an extra return flag

that would conflict.

src/uifc/uifc.h

@@ -131,6 +131,7 @@
 	#define MSK_DEL 	0x20000000
 	#define MSK_GET 	0x30000000
 	#define MSK_PUT 	0x40000000
+	/* Dont forget, negative return values are used for extended keys! */
 #else
 	#define MAX_OPTS	500 	/* Maximum number of options per menu call */
 	#define MSK_ON		0xf000