No need to intern strings here; all OUString's are ref-counted.

Calling intern() simply moves it to a global hash storage.  Now
the test passes.

Change-Id: I0a93420abce1c3adaaa61d469dff5f359dd5ada4

svl/qa/unit/svl.cxx

@@ -75,7 +75,7 @@ public:
     CPPUNIT_TEST_SUITE(Test);
     CPPUNIT_TEST(testNumberFormat);
     CPPUNIT_TEST(testStringPool);
-//  CPPUNIT_TEST(testStringPoolPurge); // FIXME: String pool's life cycle needs more work.
+    CPPUNIT_TEST(testStringPoolPurge);
     CPPUNIT_TEST(testFdo60915);
     CPPUNIT_TEST(testI116701);
     CPPUNIT_TEST_SUITE_END();

svl/source/misc/stringpool.cxx

@@ -128,7 +128,7 @@ StringPool::InsertResultType StringPool::findOrInsert( StrHashType& rPool, const
     if (it == rPool.end())
     {
         // Not yet in the pool.
-        std::pair<StrHashType::iterator, bool> r = rPool.insert(rStr.intern());
+        std::pair<StrHashType::iterator, bool> r = rPool.insert(rStr);
         if (!r.second)
             // Insertion failed.
             return InsertResultType(rPool.end(), false);