[libchamplain] Even better name

[Pierre-Luc Beaudoin <plbeaudoin src gnome org>]

commit 70501d42157beae4917d9da9e42801fb9d231157
Author: Emmanuel Rodriguez <emmanuel rodriguez gmail com>
Date:   Wed Apr 29 08:29:48 2009 +0200

    Even better name

 demos/{url-image.c => url-marker.c} |    0
 1 files changed, 0 insertions(+), 0 deletions(-)
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diff --git a/demos/url-image.c b/demos/url-marker.c
similarity index 100%
rename from demos/url-image.c
rename to demos/url-marker.c