Fix warning

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@9446 a1c6a512-1295-4272-9138-f99709370657

apps/plugins/doom/hu_lib.c

@@ -222,6 +222,7 @@ void HUlib_eraseTextLine(hu_textline_t* l)
 // KK - If someone finds a use for this code, please fix it, I havn't seen the need
 //      And it's not written to take into account scaling.  Causing some nasty effects
 //      on smaller screens.
+   (void)l;
 #if 0
    int lh;
    int y;