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-rw-r--r--gtk2_ardour/panner2d.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/gtk2_ardour/panner2d.cc b/gtk2_ardour/panner2d.cc
index c6b2bad6c9..36f7aab252 100644
--- a/gtk2_ardour/panner2d.cc
+++ b/gtk2_ardour/panner2d.cc
@@ -127,7 +127,7 @@ Panner2d::reset (uint32_t n_inputs)
}
void
-Panner2d::on_size_allocate (Gtk::Allocation alloc)
+Panner2d::on_size_allocate (Gtk::Allocation& alloc)
{
width = alloc.get_width();
height = alloc.get_height();