Bug 317614 [Forms] FormText: IllegalArgumentException when copying empty selection - Fix for Eclipse 3.7
bundles/org.eclipse.ui.forms/src/org/eclipse/ui/internal/forms/widgets/TextSegment.java
public int start;
		public int stop;
		public SelectionRange() {
			reset();
		}
		public void reset() {
			start = -1;
			stop = -1;
		}
	}
	static class TextFragment {