Bar Chart Bug

[jonatha...@ncsu.edu]

When setting the Y-axis's value range to encompass a minimum value of
0 and a maximum value of 7900, the axis label displays as if the range
is from 0 to 7000. I discovered this by telling the chart to have grid
lines which were separated by a value of 1000 (i.e. 100 * 1000 /
7900). To confirm my suspicions, I took the 1000 * ceil(7900 / 1000)
which appropriately set the maximum value to 8000, which displayed
correctly.

I'm not sure if similar graphs of other types are affected, as the
values I was using for other chart types were sufficiently close to
the automatic increment values provided by the axis.

Example:

http://chart.apis.google.com/chart?cht=bvs&chs=200x125&chd=t:10,50,60,80,40|50,60,100,40,20&chco=4d89f9,c6d9fd&chbh=a&chds=0,199&chxt=y&chxr=0,0,199&chg=20,25
http://chart.apis.google.com/chart?cht=bvs&chs=200x125&chd=t:10,50,60,80,40|50,60,100,40,20&chco=4d89f9,c6d9fd&chbh=a&chds=0,200&chxt=y&chxr=0,0,200&chg=20,25

It appears to be related to chbh=a. Using a value other than a or not
providing the parameter appears to not trigger the issue.

Example:

http://chart.apis.google.com/chart?cht=bvs&chs=200x125&chd=t:10,50,60,80,40|50,60,100,40,20&chco=4d89f9,c6d9fd&chds=0,199&chxt=y&chxr=0,0,199&chg=20,25