Modified WillDeleteSelection() to make sure that
sibling is a TextNode before trying to join it
with startNode (which is guaranteed to be a text node).
r=jfrancis@netscape.comsr=sfraser@netscape.com
git-svn-id: svn://10.0.0.236/trunk@105768 18797224-902f-48f8-a5cc-f745e15eee43