Fix tdf#93781 Impress copy wrong style name to clipboard when

style name contains Chinese character.

Encode style name in multibyte sring (ex,Chinese) properly with
RTFOutFuncs::Out_String().

Change-Id: Ibdd1010e28c711d7829643b60b32637ebce58bdb
Reviewed-on: https://gerrit.libreoffice.org/18247Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

editeng/source/editeng/impedit4.cxx

@@ -515,7 +515,8 @@ sal_uInt32 ImpEditEngine::WriteRTF( SvStream& rOutput, EditSelection aSel )
                 rOutput.WriteUInt32AsString( nNumber );
 
                 // Name of the template ...
-                rOutput.WriteCharPtr( " " ).WriteCharPtr( OUStringToOString(pStyle->GetName(), eDestEnc).getStr() );
+                rOutput.WriteCharPtr( " " );
+                RTFOutFuncs::Out_String( rOutput, pStyle->GetName(), eDestEnc );
                 rOutput.WriteCharPtr( ";}" );
                 nStyle++;
             }