'r' means C++ reference, but this mormal local OUString variable is not that

Change-Id: I56d21c3dc09f972a415bbd74dc635b231373d9f3
diff --git a/sfx2/source/appl/childwin.cxx b/sfx2/source/appl/childwin.cxx
index 8ce0dda..37391b4 100644
--- a/sfx2/source/appl/childwin.cxx
+++ b/sfx2/source/appl/childwin.cxx
@@ -286,12 +286,12 @@ void SfxChildWindow::SaveStatus(const SfxChildWinInfo& rInfo)
{
    sal_uInt16 nID = GetType();

    OUString rInfoVisible = rInfo.bVisible ? OUString("V") : OUString("H");
    OUString aInfoVisible = rInfo.bVisible ? OUString("V") : OUString("H");

    OUString aWinData = "V"
                      + OUString::number(static_cast<sal_Int32>(nVersion))
                      + ","
                      + rInfoVisible
                      + aInfoVisible
                      + ","
                      + OUString::number(static_cast<sal_Int32>(rInfo.nFlags));