destroy memheap mutex properly before memheap deleted

(fix memory leak occured after r304950 changes with DEBUG_THREAD compile option)



git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.8@339087 65c4cc65-6c06-0410-ace0-fbb531ad65f3

addons/ooh323c/src/memheap.c

@@ -1078,9 +1078,10 @@ void memHeapRelease (void** ppvMemHeap)
          free (pMemLink2);
       }
 
-      if ((*ppMemHeap)->flags & RT_MH_FREEHEAPDESC)
+      if ((*ppMemHeap)->flags & RT_MH_FREEHEAPDESC) {
+         ast_mutex_destroy(&pMemHeap->pLock);
          free (*ppMemHeap);
-
+      }
       *ppMemHeap = 0;
    }
 }