Add check for the number of pages

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@532777 13f79535-47bb-0310-9956-ffa450edef68

test/layoutengine/standard-testcases/table_keep-with-next.xml

@@ -65,6 +65,8 @@
     </fo:root>
   </fo>
   <checks>
+    <!-- Two pages -->
+    <eval expected="2" xpath="count(//pageViewport)"/>
     <!-- Only one line on the first page -->
     <eval expected="1" xpath="count(//pageViewport[@nr=1]//flow/block)"/>
     <eval expected="First line" xpath="//pageViewport[@nr=1]//flow/block[1]/lineArea/text[1]"/>

test/layoutengine/standard-testcases/table_keep-with-previous.xml

@@ -65,6 +65,8 @@
     </fo:root>
   </fo>
   <checks>
+    <!-- Two pages -->
+    <eval expected="2" xpath="count(//pageViewport)"/>
     <!-- Only one line on the first page -->
     <eval expected="1" xpath="count(//pageViewport[@nr=1]//flow/block)"/>
     <eval expected="First line" xpath="//pageViewport[@nr=1]//flow/block[1]/lineArea/text[1]"/>