*: fix fallout from -Wunused-parameter

function                                             old     new   delta
bbunpack                                             358     366      +8
passwd_main                                         1070    1072      +2
handle_incoming_and_exit                            2651    2653      +2
getpty                                                88      86      -2
script_main                                          975     972      -3
inetd_main                                          2036    2033      -3
dname_enc                                            377     373      -4
make_new_session                                     474     462     -12
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/5 up/down: 12/-24)            Total: -12 bytes
   text    data     bss     dec     hex filename
 797429     658    7428  805515   c4a8b busybox_old
 797417     658    7428  805503   c4a7f busybox_unstripped

diff --git a/networking/wget.c b/networking/wget.c
index dc1dc2a..f8adcd7 100644
--- a/networking/wget.c
+++ b/networking/wget.c
@@ -189,7 +189,7 @@
  */
 #else /* FEATURE_WGET_STATUSBAR */
 
-static ALWAYS_INLINE void progressmeter(int flag) { }
+static ALWAYS_INLINE void progressmeter(int flag ATTRIBUTE_UNUSED) { }
 
 #endif