#11 wrong maximumX function for Bar Chart

[swisscarbon]

the maximumX value in Bar.php is calculated using the number of
Bins

function _maximumX()
{
if ($this->_dataset) {
return $this->_dataset->count() + 1;
}
}

this does not work if you've got a dataset where the bins are spread
over a bigger distance.

IMHO the function should look something like:

function _maximumX()
{
if ($this->_dataset) {
return $this->_dataset->maximumX() +1;
}
}

the minimumX function too, could be replaced acordingly.