[glom] test_python_execute_func_with_record_field_types: Take a map parameter by reference.

[Murray Cumming <murrayc src gnome org>]

commit ddb9f40773fb6b657474418a82b9c24ea6bb607b
Author: Murray Cumming <murrayc murrayc com>
Date:   Wed Mar 30 11:55:29 2016 +0200

    test_python_execute_func_with_record_field_types: Take a map parameter by reference.
    
    Found by cppcheck.

 ..._python_execute_func_with_record_field_types.cc |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/tests/python/test_python_execute_func_with_record_field_types.cc 
b/tests/python/test_python_execute_func_with_record_field_types.cc
index d13f54c..78d972c 100644
--- a/tests/python/test_python_execute_func_with_record_field_types.cc
+++ b/tests/python/test_python_execute_func_with_record_field_types.cc
@@ -35,7 +35,7 @@ static bool get_field_result(const std::shared_ptr<Glom::Document>& document,
   const Glib::ustring& table_name,
   const std::shared_ptr<const Glom::Field>& primary_key_field,
   const Gnome::Gda::Value& primary_key_value,
-  const Glom::type_map_fields field_values,
+  const Glom::type_map_fields& field_values,
   const Glib::ustring& field_name, const Gnome::Gda::Value& expected_value)
 {
   const Glib::ustring calculation = "return record[\"" + field_name + "\"]";