[review] fix API break in qmi_message_tlv_read_gfloat()

[Dan Williams]

On Tue, 2018-07-10 at 21:52 +0200, Aleksander Morgado wrote:
> Hey Thomas, Dan and everyone,
> 
> See this MR:
> https://gitlab.freedesktop.org/mobile-broadband/libqmi/merge_requests
> /2
> 
> In order to fix this issue introduced when modifying the
> qmi_message_tlv_read_gfloat() method, which is part of the API.
> https://gitlab.freedesktop.org/mobile-broadband/libqmi/issues/1

Merged to git master.

Dan