Add missing change from resolution of merge

Missed a change resolving merges for PhotoPanel.java

Signed-off-by: Billy Olsen <billy.olsen@gmail.com>

swing/src/net/sf/openrocket/gui/figure3d/photo/PhotoPanel.java

@@ -116,6 +116,16 @@ public class PhotoPanel extends JPanel implements GLEventListener {
 		});
 	}
 
+	void clearDoc() {
+		document.removeDocumentChangeListener(changeListener);
+		changeListener = null;
+		document = null;
+	}
+
+	PhotoSettings getSettings() {
+		return p;
+	}
+
 	PhotoPanel(OpenRocketDocument document, PhotoSettings p) {
     this.p = p;
 		this.setLayout(new BorderLayout());