no need to allocate KeyedValues separately

Change-Id: If28471436d224e88dfee07f3b8465648867197fd
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/120291
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
diff --git a/comphelper/source/container/enumerablemap.cxx b/comphelper/source/container/enumerablemap.cxx
index ae6053d..a8897c2 100644
--- a/comphelper/source/container/enumerablemap.cxx
+++ b/comphelper/source/container/enumerablemap.cxx
@@ -39,6 +39,7 @@
#include <cmath>
#include <map>
#include <memory>
#include <optional>
#include <utility>

namespace comphelper
@@ -89,7 +90,7 @@ namespace comphelper
    {
        Type                                        m_aKeyType;
        Type                                        m_aValueType;
        std::unique_ptr< KeyedValues >            m_pValues;
        std::optional< KeyedValues >                m_pValues;
        std::shared_ptr< IKeyPredicateLess >      m_pKeyCompare;
        bool                                        m_bMutable;
        std::vector< MapEnumerator* >             m_aModListeners;
@@ -102,11 +103,11 @@ namespace comphelper
        MapData( const MapData& _source )
            :m_aKeyType( _source.m_aKeyType )
            ,m_aValueType( _source.m_aValueType )
            ,m_pValues( new KeyedValues( *_source.m_pValues ) )
            ,m_pKeyCompare( _source.m_pKeyCompare )
            ,m_bMutable( false )
            ,m_aModListeners()
        {
            m_pValues.emplace( *_source.m_pValues );
        }
    private:
        MapData& operator=( const MapData& _source ) = delete;
@@ -356,7 +357,7 @@ namespace comphelper
        m_aData.m_aKeyType = aKeyType;
        m_aData.m_aValueType = aValueType;
        m_aData.m_pKeyCompare = std::move(pComparator);
        m_aData.m_pValues.reset( new KeyedValues( *m_aData.m_pKeyCompare ) );
        m_aData.m_pValues.emplace( *m_aData.m_pKeyCompare );
        m_aData.m_bMutable = bMutable;

        if ( aInitialValues.hasElements() )