Macro gfx_shader_watch::debug_watcher_pso_cell

macro_rules! debug_watcher_pso_cell {
    (pipe = $pipe_name:ident,
    vertex_shader = $vs:expr,
    fragment_shader = $fs:expr,
    factory = $factory:expr) => { ... };
    (pipe = $pipe_name:ident,
    vertex_shader = $vs:expr,
    fragment_shader = $fs:expr,
    factory = $factory:expr,
    $($opt:ident = $opt_val:expr),+) => { ... };
}