Coding style: annotate a fall-through in printf.c
diff --git a/printf.c b/printf.c
index 97e2c2d..9051d71 100644
--- a/printf.c
+++ b/printf.c
@@ -1,6 +1,6 @@
 /*
  * This file is part of ltrace.
- * Copyright (C) 2011,2012 Petr Machata, Red Hat Inc.
+ * Copyright (C) 2011,2012,2013 Petr Machata, Red Hat Inc.
  * Copyright (C) 1998,2004,2007,2008,2009 Juan Cespedes
  * Copyright (C) 2006 Steve Fink
  * Copyright (C) 2006 Ian Wienand
@@ -270,6 +270,7 @@
 
 		case 'x': case 'X':
 			lens = &hex_lens;
+			/* Fall through.  */
 		case 'u':
 		uint:
 			format_type = ARGTYPE_UINT;