Help old GCC versions

Change-Id: I17e05a0ca985241030c71e7d08b81c1290ef1bc9
diff --git a/vcl/source/app/IconThemeSelector.cxx b/vcl/source/app/IconThemeSelector.cxx
index 91a082c..556d31a 100644
--- a/vcl/source/app/IconThemeSelector.cxx
+++ b/vcl/source/app/IconThemeSelector.cxx
@@ -84,7 +84,7 @@ IconThemeSelector::SelectIconThemeForDesktopEnvironment(
        }
        //if a dark variant is preferred, and we didn't have an exact match, then try our one and only dark theme
        if (mPreferredIconTheme.endsWith("_dark") && icon_theme_is_in_installed_themes("breeze_dark", installedThemes)) {
            return "breeze_dark";
            return OUString("breeze_dark");
        }
    }