add std::ostream operators for Region and PolyPolygon

Change-Id: I8f4129b840a27f3029643ad2a4852f9e10604905

include/tools/poly.hxx

@@ -278,6 +278,18 @@ public:
 
 typedef std::vector< PolyPolygon > PolyPolyVector;
 
+
+template<typename charT, typename traits>
+inline std::basic_ostream<charT, traits> & operator <<(
+    std::basic_ostream<charT, traits> & stream, const PolyPolygon& rPolyPoly)
+{
+    if (!rPolyPoly.Count())
+        stream << "EMPTY";
+    for (sal_uInt16 i = 0; i < rPolyPoly.Count(); ++i)
+        stream << "[" << i << "] " << rPolyPoly.GetObject(i);
+    return stream;
+}
+
 #endif
 
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