Using SWT.DEFAULT halves diff widget size computation again

For whatever reason, commentAndDiffComposite.computeSize() is faster if
both given size hints are SWT.DEFAULT.

Bug: 473013
Change-Id: I9e9dd6f17e8b2dc660d067abb65b470df8031f63
Signed-off-by: Andrey Loskutov <loskutov@gmx.de>
diff --git a/org.eclipse.egit.ui/src/org/eclipse/egit/ui/internal/history/GitHistoryPage.java b/org.eclipse.egit.ui/src/org/eclipse/egit/ui/internal/history/GitHistoryPage.java
index 23e428c..9930a1c 100644
--- a/org.eclipse.egit.ui/src/org/eclipse/egit/ui/internal/history/GitHistoryPage.java
+++ b/org.eclipse.egit.ui/src/org/eclipse/egit/ui/internal/history/GitHistoryPage.java
@@ -2028,17 +2028,8 @@
 			start = System.currentTimeMillis();
 		}
 
-		int widthHint;
-		if (commentViewer.getTextWidget().getWordWrap()) {
-			widthHint = commentAndDiffScrolledComposite.getClientArea().width;
-			if (commentAndDiffScrolledComposite.getVerticalBar() != null
-					&& !commentAndDiffScrolledComposite.getVerticalBar().isVisible())
-				widthHint -= commentAndDiffScrolledComposite.getVerticalBar().getSize().x;
-		} else {
-			widthHint = SWT.DEFAULT;
-		}
 		Point size = commentAndDiffComposite
-				.computeSize(widthHint, SWT.DEFAULT);
+				.computeSize(SWT.DEFAULT, SWT.DEFAULT);
 		commentAndDiffScrolledComposite.setMinSize(size);
 		resizing = false;