0px changed to output 0 and removing an unneeded variable from the calc-rhythm-px function
0px changed to output 0 and removing an unneeded variable from the calc-rhythm-px function

nzpost/nzpost-pattern-library,nzpost/nzpost-pattern-library,nzpost/nzpost-pattern-library,nzpost/nzpost-pattern-library,nzpost/nzpost-pattern-library