[vala/staging] codegen: Don't use temp variable for stack allocated simple type assignment

[Rico Tzschichholz <ricotz src gnome org>]

commit 32ffc862417be39d42a1b8eeb3d0748b3e138aff
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Thu Nov 22 14:58:34 2018 +0100

    codegen: Don't use temp variable for stack allocated simple type assignment

 codegen/valaccodememberaccessmodule.vala | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/codegen/valaccodememberaccessmodule.vala b/codegen/valaccodememberaccessmodule.vala
index faf4545c9..06a4d2bb4 100644
--- a/codegen/valaccodememberaccessmodule.vala
+++ b/codegen/valaccodememberaccessmodule.vala
@@ -765,6 +765,10 @@ public abstract class Vala.CCodeMemberAccessModule : CCodeControlFlowModule {
                        // except for structs that are always passed by reference
                        use_temp = false;
                }
+               if (result.value_type.is_non_null_simple_type ()) {
+                       // no need to an extra copy of variables that are stack allocated simple types
+                       use_temp = false;
+               }
                var local = variable as LocalVariable;
                if (local != null && local.name[0] == '.') {
                        // already a temporary variable generated internally