Fixed a bug with stacking bars when there's missing something in the bottom-most series
Fixed a bug with stacking bars when there's missing something in the
bottom-most series

anirudhb029/flot,Letractively/flot,ShiboBrady/flot,dileep502/flot,zhaoweikai/flot,Sharkesm/flot,sangltdn/flot,anirudhb029/flot,nvizero/flot,wildanSawaludin/flot,MAWAVANSMOOKEY/flot,tectronics/flot,Deprof/flot,TanTayBui/flot,Elvina456/flot,gauravkumar13337/flot,HerySetiaji/flot,muoki/flot,hongxing314/flot,wildanSawaludin/flot,kaz1973/flot,sangltdn/flot,PrevorCZ/flot,AndBicScadMedia/flot,Kemallyson/flot,zhaoweikai/flot