Zoomed in graphs lose hostname

[Stuffle, David]

I know this is really minor, but when I zoom in on a graph the hostname at
the top of the graph changes to "undefined".  It only matters when we print
the graph, we don't know which host it was from.  Again, really minor but I
thought I'd mention it in case it's one of those quicky fixes.

Thanks

~~~~~~~~~~~~~~
David Stuffle                         
Delta Faucet Company


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