[PyQt] Deprecation warnings with sip 4.18 and PyQt 4.11.4

[Matthias Kuhn]

Hi,

Since updating to SIP 4.18 we get a lot of warnings when compiling
against PyQt 4.11.4 [1], caused by /DocType/ deprecation.

We have a no warning policy and at the moment have to disable mac osx
tests because homebrew uses SIP 4.18 and provides QScintilla built with
this version so we cannot stick to SIP 4.17 without rebuilding other
dependencies. In the end it's just all too complicated for a simple
deprecation warning triggered by a dependency.

I noticed there was a commit 1c8c7394191e which "removes uses of the
deprecated /DocValue/ annotation".
I wonder if this would fix our issues and when this is expected to be
released.
Or is there another possibility to suppress SIP warnings?

Thanks
Matthias

[1] http://dash.orfeo-toolbox.org/viewBuildError.php?buildid=226399