*: make 2 more "int argc"'s unused; more saved if !DESKTOP

function                                             old     new   delta
sync_main                                             18      20      +2
tty_main                                              90      87      -3
iprule_list                                           83      79      -4

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/include/libbb.h b/include/libbb.h
index 8d3df61..cda59dc 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -1022,7 +1022,11 @@
 extern void erase_mtab(const char * name) FAST_FUNC;
 extern unsigned int tty_baud_to_value(speed_t speed) FAST_FUNC;
 extern speed_t tty_value_to_baud(unsigned int value) FAST_FUNC;
-extern void bb_warn_ignoring_args(int n) FAST_FUNC;
+#if ENABLE_DESKTOP
+extern void bb_warn_ignoring_args(char *arg) FAST_FUNC;
+#else
+# define bb_warn_ignoring_args(arg) ((void)0)
+#endif
 
 extern int get_linux_version_code(void) FAST_FUNC;