Use XLAT_END macro

Automatically update all xlat structures using the following sed regexp:
s/^[[:space:]]*{[[:space:]]*0[[:space:]]*,[[:space:]]*NULL[[:space:]]*,\?[[:space:]]*}[[:space:]]*,\?[[:space:]]*/\tXLAT_END/
diff --git a/io.c b/io.c
index 2ed7fa5..fac5615 100644
--- a/io.c
+++ b/io.c
@@ -330,7 +330,7 @@
 #ifdef SPLICE_F_GIFT
 	XLAT(SPLICE_F_GIFT),
 #endif
-	{ 0,                 NULL                },
+	XLAT_END
 };
 
 int