[t:4871] fix test-rollinclude to avoid a use-after-free bug

git-svn-id: file:///svn/toku/tokudb@43632 c7de825b-a66e-492c-adef-691d508d4ae1

src/tests/test-rollinclude.c

@@ -24,7 +24,7 @@ populate(DB_ENV *env, DB *db, int nrows) {
     }
 
     r = txn->commit(txn, 0); assert_zero(r);
-    r = txn->commit(parent, 0); assert_zero(r);
+    r = parent->commit(parent, 0); assert_zero(r);
 }
 
 static void