oetiker/rrdtool-1.x — pull request #517 by petgit (2014-07-13 14:26:03+00:00)
Title: Create rrd file: Allow only short integer numbers in rpn formula

It is possible to write a rpn formula in create rrd as decimal numbers.
But in the rrdfile it is stored as short integer.
Now an error is thrown if the number is no integer.