X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=glwidget.cpp;h=cccfa3af631b6d869255cf8f3b06addc2019c1dc;hb=b9feb66845bf24465b7671ac9ff7a52b88f6032b;hp=e7f56b350672a67c0bf78dcbeb8e975651ec20ef;hpb=f18d7ca5c487c54a7948179f68fb9d2e5616d98e;p=nageru

diff --git a/glwidget.cpp b/glwidget.cpp
index e7f56b3..cccfa3a 100644
--- a/glwidget.cpp
+++ b/glwidget.cpp
@@ -135,7 +135,9 @@ void GLWidget::show_context_menu(const QPoint &pos)
 	}
 	if (output >= Mixer::OUTPUT_INPUT0) {
 		int signal_num = global_mixer->get_channel_signal(output);
-		show_preview_context_menu(signal_num, pos);
+		if (signal_num != -1) {
+			show_preview_context_menu(signal_num, pos);
+		}
 	}
 }