message: Fix parameter generation for RGP event names
diff: @@ -277,7 +277,7 @@ void RGPInterop::CreateMapping(const rdcarray<ActionDescription> &actions)
  const SDObject *o = chunk->GetChild(i);
  if(o->type.flags & SDTypeFlags::Important)
  {
  - if(first)
  + if(!first)
  n += ", ";
  first = false;
  n += ToStr(o->AsUInt32());
  