PHP respects locales (LC_NUMERIC) when casting floats to string. That
affected the generated HTML for our inline pie charts. This patch is
not that beautiful - but fixes this.
fixes#6348
Use floats as path coordinates in PieSlices, to
avoid that the start and ending position of the arc are at the exact same
position. This would cause buggy behavior, when displaying values like "99,999%".
refs #5863
Marius Hein
Thomas Gelf
Matthias Jentsch
Johannes Meyer