Use comphelper::concatSequences to reduce copypaste

Change-Id: I15aafc657680d476abdba621ec6c3288beafc55f
Reviewed-on: https://gerrit.libreoffice.org/71847
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

xmloff/source/core/PropertySetMerger.cxx

@@ -25,6 +25,7 @@ using namespace ::com::sun::star::uno;
 using namespace ::com::sun::star::beans;
 using namespace ::com::sun::star::lang;
 
+#include <comphelper/sequence.hxx>
 #include <cppuhelper/implbase3.hxx>
 
 class PropertySetMergerImpl : public ::cppu::WeakAggImplHelper3< XPropertySet, XPropertyState, XPropertySetInfo >
@@ -200,26 +201,9 @@ Any SAL_CALL PropertySetMergerImpl::getPropertyDefault( const OUString& aPropert
 Sequence< Property > SAL_CALL PropertySetMergerImpl::getProperties()
 {
     Sequence< Property > aProps1( mxPropSet1Info->getProperties() );
-    const Property* pProps1 = aProps1.getArray();
-    const sal_Int32 nCount1 = aProps1.getLength();
-
     Sequence< Property > aProps2( mxPropSet1Info->getProperties() );
-    const Property* pProps2 = aProps2.getArray();
-    const sal_Int32 nCount2 = aProps2.getLength();
-
-    Sequence< Property > aProperties( nCount1 + nCount2 );
-
-    sal_Int32 nIndex;
-
-    Property* pProperties = aProperties.getArray();
-
-    for( nIndex = 0; nIndex < nCount1; nIndex++ )
-        *pProperties++ = *pProps1++;
-
-    for( nIndex = 0; nIndex < nCount2; nIndex++ )
-        *pProperties++ = *pProps2++;
 
-    return aProperties;
+    return comphelper::concatSequences(aProps1, aProps2);
 }
 
 Property SAL_CALL PropertySetMergerImpl::getPropertyByName( const OUString& aName )