PCAPanel just requires viewport

diff --git a/src/jalview/gui/AlignFrame.java b/src/jalview/gui/AlignFrame.java
index 79dc866..b6705ad 100755 (executable)
--- a/src/jalview/gui/AlignFrame.java
+++ b/src/jalview/gui/AlignFrame.java
@@ -1836,7 +1836,7 @@ public class AlignFrame
       return;\r
     }\r
 \r
-      PCAPanel pcaPanel = new PCAPanel(viewport, null);\r
+      PCAPanel pcaPanel = new PCAPanel(viewport);\r
       JInternalFrame frame = new JInternalFrame();\r
       frame.setContentPane(pcaPanel);\r
       Desktop.addInternalFrame(frame, "Principal component analysis",\r