Move FilteredTree parent assignment to abstract base class

The "parent" field is not set properly for the e4 FilteredTree and
FilteredTable when using the protected constructor. Move the assignment
to the common base class to avoid undesirable NullPointerExceptions.

Amends 176f503

Author: ptziegler

bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/AbstractFilteredViewerComposite.java

@@ -84,6 +84,7 @@ public abstract class AbstractFilteredViewerComposite<T extends ViewerFilter> ex
 	 */
 	public AbstractFilteredViewerComposite(Composite parent, int style, long refreshJobDelayInMillis) {
 		super(parent, style);
+		this.parent = parent;
 		this.refreshJobDelayInMillis = refreshJobDelayInMillis;
 	}
 

bundles/org.eclipse.ui.workbench/eclipseui/org/eclipse/ui/dialogs/FilteredTree.java

@@ -135,7 +135,6 @@ public class FilteredTree extends AbstractFilteredViewerComposite<PatternFilter>
 	 */
 	public FilteredTree(Composite parent, boolean useNewLook, boolean useFastHashLookup) {
 		super(parent, SWT.NONE, DEFAULT_REFRESH_TIME);
-		this.parent = parent;
 		if (treeViewer != null) {
 			treeViewer.setUseHashlookup(useFastHashLookup);
 		}
@@ -180,7 +179,6 @@ public FilteredTree(Composite parent, int treeStyle, PatternFilter filter, boole
 	public FilteredTree(Composite parent, int treeStyle, PatternFilter filter, boolean useNewLook,
 			boolean useFastHashLookup, long refreshJobDelayInMillis) {
 		super(parent, SWT.NONE, refreshJobDelayInMillis);
-		this.parent = parent;
 		init(treeStyle, filter);
 		if (treeViewer != null) {
 			treeViewer.setUseHashlookup(useFastHashLookup);
@@ -211,7 +209,6 @@ public FilteredTree(Composite parent, int treeStyle, PatternFilter filter, boole
 	@Deprecated
 	protected FilteredTree(Composite parent) {
 		super(parent, SWT.NONE, DEFAULT_REFRESH_TIME);
-		this.parent = parent;
 	}
 
 	/**