[CodecHandler] Dont always override internal codec name

If codec name its the same dont override the internal codec name to prevent to get lost the custom ec3-joc internal name
this is needed until kodi implements ffmpeg 6.1 or greater from that version can detect the Atmos profile

src/codechandler/CodecHandler.cpp

@@ -52,7 +52,7 @@ bool CodecHandler::UpdateInfoCodecName(kodi::addon::InputstreamInfo& info, const
 
   AP4_String codecStr;
   m_sampleDescription->GetCodecString(codecStr);
-  if (codecStr.GetLength() > 0 && info.GetCodecInternalName() != codecStr.GetChars())
+  if (isChanged && codecStr.GetLength() > 0 && info.GetCodecInternalName() != codecStr.GetChars())
   {
     info.SetCodecInternalName(codecStr.GetChars());
     isChanged = true;