fix stem-export buffer-size check

diff --git a/libs/ardour/export_channel.cc b/libs/ardour/export_channel.cc
index c67f33bb918e5dc3b4a0f69b1328a7d2a123c6d3..0e029a01f7731e06759c5535717bf5541bb28a10 100644 (file)
--- a/libs/ardour/export_channel.cc
+++ b/libs/ardour/export_channel.cc
@@ -239,7 +239,7 @@ RouteExportChannel::read (Sample const *& data, framecnt_t frames) const
 {
        assert(processor);
        AudioBuffer const & buffer = processor->get_capture_buffers().get_audio (channel);
-       assert (frames <= (framecnt_t) buffer.size());
+       assert (frames <= (framecnt_t) buffer.capacity());
        data = buffer.data();
 }