Fix broken codegen unittests

src/test/unit/mock/gpcodegen_mock.c

@@ -82,7 +82,8 @@ void*
 ExecEvalExprCodegenEnroll(ExecEvalExprFn regular_func_ptr,
                           ExecEvalExprFn* ptr_to_regular_func_ptr,
                           struct ExprState *exprstate,
-                          struct ExprContext *econtext)
+                          struct ExprContext *econtext,
+                          struct TupleTableSlot* slot)
 {
   *ptr_to_regular_func_ptr = regular_func_ptr;
    elog(ERROR, "mock implementation of ExecEvalExprCodegenEnroll called");