valgrind: memleak in randompool

regression from

commit 91457fb326
Author: Norbert Thiebaud <nthiebaud@gmail.com>
Date:   Tue Apr 21 20:55:15 2015 -0500

    use osl_get_system_random data in rtlRamdomPool

Change-Id: Ib5ff6b7fbd08869d9a6dbc1f4df883d701cf765c

sal/rtl/random.cxx

@@ -298,8 +298,8 @@ void SAL_CALL rtl_random_destroyPool (rtlRandomPool Pool) SAL_THROW_EXTERN_C()
         if(pImpl->m_hDigest)
         {
             rtl_digest_destroy (pImpl->m_hDigest);
-            rtl_freeZeroMemory (pImpl, sizeof (RandomPool_Impl));
         }
+        rtl_freeZeroMemory (pImpl, sizeof (RandomPool_Impl));
     }
 }