Added condition to preserve last difference if current difference equals 0
Added condition to preserve last difference if current difference equals 0

domeq/stp.rtm,domeq/stp.rtm,pdziok/stp.rtm,domeq/stp.rtm,Schibsted-Tech-Polska/stp.rtm,pdziok/stp.rtm,domeq/stp.rtm,Schibsted-Tech-Polska/stp.rtm,pdziok/stp.rtm,Schibsted-Tech-Polska/stp.rtm,pdziok/stp.rtm,domeq/stp.rtm,pdziok/stp.rtm,Schibsted-Tech-Polska/stp.rtm,Schibsted-Tech-Polska/stp.rtm