Fix a crash in Mail when forwarding a specific HTML email.

        Caused by the fix for <rdar://problem/6512520> (r42096).
        Unable to create a test case that works outside of Mail.

        <rdar://problem/6796069>

        Reviewed by Ada Chan.

        * editing/markup.cpp:
        (WebCore::createMarkup): Null check pastEnd before trying to
        call Range::compareBoundaryPoints.

git-svn-id: svn://svn.chromium.org/blink/trunk@42753 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/WebCore/ChangeLog

+2009-04-22  Timothy Hatcher  <timothy@apple.com>
+
+        Fix a crash in Mail when forwarding a specific HTML email.
+        Caused by the fix for <rdar://problem/6512520> (r42096).
+        Unable to create a test case that works outside of Mail.
+
+        <rdar://problem/6796069>
+
+        Reviewed by Ada Chan.
+
+        * editing/markup.cpp:
+        (WebCore::createMarkup): Null check pastEnd before trying to
+        call Range::compareBoundaryPoints.
+
 2009-04-22  Sam Weinig  <sam@webkit.org>
 
         Rubber-stamped by Darin Adler.

third_party/WebKit/WebCore/editing/markup.cpp

@@ -808,7 +808,7 @@ String createMarkup(const Range* range, Vector<Node*>* nodes, EAnnotateForInterc
         markups.append(interchangeNewlineString);
         startNode = visibleStart.next().deepEquivalent().node();
 
-        if (Range::compareBoundaryPoints(startNode, 0, pastEnd, 0) >= 0) {
+        if (pastEnd && Range::compareBoundaryPoints(startNode, 0, pastEnd, 0) >= 0) {
             if (deleteButton)
                 deleteButton->enable();
             return interchangeNewlineString;