a few patches (please review/commit)

[Hubert Figuiere <hfiguiere teaser fr>]

Hi 

I have made a few patches for Dia.

See bugzilla:

Build breakage in some cases:
http://bugzilla.gnome.org/show_bug.cgi?id=115587

Build system more conformant to what other do:
http://bugzilla.gnome.org/show_bug.cgi?id=104650

Some HIG suggestions:
http://bugzilla.gnome.org/show_bug.cgi?id=116000

Can someone review and possibly apply them ?
I don't mind doing it myself, I just need a GNOME CVS account (and
more rights in bugzilla).

Thanks

Hub
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Unemployed AbiWord maintainer - Lille, France
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