Fix long-standing bug in spacer expose+render.

diff --git a/libs/widgets/widgets/ardour_spacer.h b/libs/widgets/widgets/ardour_spacer.h
index 520ad670af5ea6b798a3d7db1e2dc2c665d58dd2..b2668f19d73306561a835b69ba566225b5995799 100644 (file)
--- a/libs/widgets/widgets/ardour_spacer.h
+++ b/libs/widgets/widgets/ardour_spacer.h
@@ -31,9 +31,12 @@ public:
        ArdourVSpacer (float r = 0.75f);
 
 protected:
-       void render (Cairo::RefPtr<Cairo::Context> const& ctx, cairo_rectangle_t* r) {
-               float h = r->height * ratio;
-               float t = .5f * (r->height - h);
+       void render (Cairo::RefPtr<Cairo::Context> const& ctx, cairo_rectangle_t*) {
+
+               float height = get_height();
+
+               float h = height * ratio;
+               float t = .5f * (height - h);
                ctx->rectangle (0, t, 1, h);
                ctx->set_source_rgb (0, 0, 0);
                ctx->fill ();