[PDF] Add setPage method to SkPDFDocument.

BUG=312

Review URL: http://codereview.appspot.com/4763047

git-svn-id: http://skia.googlecode.com/svn/trunk@1892 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/pdf/SkPDFPage.cpp b/src/pdf/SkPDFPage.cpp
index 2a8183d..c162d51 100644
--- a/src/pdf/SkPDFPage.cpp
+++ b/src/pdf/SkPDFPage.cpp
@@ -114,6 +114,7 @@
                     catalog->addObject(curNodes[i], false);
                 } else {
                     SkSafeUnref(curNodes[i]);
+                    catalog->addObject(curNodes[i], true);
                 }
             }