Addresses #567

Fixes memory leak (in a test)

git-svn-id: file:///svn/tokudb@3136 c7de825b-a66e-492c-adef-691d508d4ae1

src/lock_tree/tests/test_00030_rth.c

@@ -96,6 +96,7 @@ int main(int argc, const char *argv[]) {
     }
     toku_rth_clear(rth);
     assert(toku_rth_is_empty(rth));
+    toku_rth_close(rth);
     rth = NULL;
 
     return 0;