trying to block (and save cpu power) more dynamically

instead of blocking too long if inpblock is set to something like
500ms the input timeout is not set directly to inpblock but is
increasing dynamically from 0 to inpblock by a little algorithm

FIXME: the call from the win_* method to the ui_input_* method looks
wrong.. this causes a cross reference which shouldn't be

src/command/commands.c

@@ -3455,7 +3455,7 @@ cmd_inpblock(gchar **args, struct cmd_help_t help)
     if (_strtoi(value, &intval, 1, 1000) == 0) {
         cons_show("Input blocking set to %d milliseconds.", intval);
         prefs_set_inpblock(intval);
-        ui_input_nonblocking();
+        ui_input_nonblocking(FALSE);
     }
     return TRUE;
 }