Bug#439672: webkit should build-depends on qt4.3

[Hubert Figuiere]

Mike Hommey wrote:

>> webkit should build-depends on libqt4-dev (>= 4.3) because it use Qt4.3
>> specific features like QStringRef.
> 
> I'm not exactly opposed to the idea, though libqt4-dev 4.3 is present in
> testing, already. It might be better to avoid people wasting time
> backporting it to etch without having Qt 4.3 backported first.

That was my point. I was rebuilding the package on Ubuntu Feisty that
only have 4.2.x

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