* xdisp.c (vmessage): Mark as a printf-like function.

src/ChangeLog

@@ -2,6 +2,8 @@
 	Fix more problems found by GCC 4.6.0's static checks.
+	* xdisp.c (vmessage): Mark as a printf-like function.
+
 	* term.c (vfatal, maybe_fatal): Mark as printf-like functions.
 	* sound.c (sound_warning): Don't crash if arg contains a printf format.

src/xdisp.c

@@ -774,6 +774,7 @@ static int store_mode_line_noprop (const char *, int, int);
 static void handle_stop (struct it *);
 static void handle_stop_backwards (struct it *, EMACS_INT);
 static int single_display_spec_intangible_p (Lisp_Object);
+static void vmessage (const char *, va_list) ATTRIBUTE_FORMAT_PRINTF (1, 0);
 static void ensure_echo_area_buffers (void);
 static Lisp_Object unwind_with_echo_area_buffer (Lisp_Object);
 static Lisp_Object with_echo_area_buffer_unwind_data (struct window *);