[vala/staging] codegen: Avoid use of temp-var to access in/ref parameters

[Rico Tzschichholz <ricotz src gnome org>]

commit 58330ecec5b336e4c588020887ad81ff8fd38278
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Tue Nov 21 21:21:48 2017 +0100

    codegen: Avoid use of temp-var to access in/ref parameters
    
    https://bugzilla.gnome.org/show_bug.cgi?id=789071

 codegen/valaccodememberaccessmodule.vala |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/codegen/valaccodememberaccessmodule.vala b/codegen/valaccodememberaccessmodule.vala
index 6bb5cb2..317a545 100644
--- a/codegen/valaccodememberaccessmodule.vala
+++ b/codegen/valaccodememberaccessmodule.vala
@@ -734,7 +734,7 @@ public abstract class Vala.CCodeMemberAccessModule : CCodeControlFlowModule {
                        // special handling for types such as va_list
                        use_temp = false;
                }
-               if (variable is Parameter && variable.name == "this") {
+               if (variable is Parameter && (variable.name == "this" || ((Parameter) variable).direction != 
ParameterDirection.OUT)) {
                        use_temp = false;
                }
                if (variable.single_assignment && !result.value_type.is_real_non_null_struct_type ()) {