When preloading the @spent_hours@ of issues (as e.g. done for #20661, they default to @0@ instead of the previous default @0.0@. This results in a change of the @issue#show@ API which now also returns an Integer instead of a Float. Previously (in Redmine 3.2), the API used to return the data the following way:

{
  "issue": {
    "id": 15,
    ...
    "spent_hours": 0.0,
    ...
  }
}

While later versions (including the current trunk) return them as follows:

{
  "issue": {
    "id": 15,
    ...
    "spent_hours": 0,
    ...
  }
}

This appears to break strict API clients which expect a float there. In our tests, this change appears to break the current Android version of RedminePM, probably due to some internal type exceptions. The attached patch was extracted from "Planio":https://plan.io/redmine-hosting and fixes this behavior. With it, we follow the previous behavior of always sending Floats.