only apply a topology delta on block if a new one arrives
only apply a topology delta on block if a new one arrives

sgebbie/ponyc,Perelandric/ponyc,Praetonus/ponyc,jupvfranco/ponyc,kulibali/ponyc,Theodus/ponyc,kulibali/ponyc,mkfifo/ponyc,dipinhora/ponyc,Perelandric/ponyc,Theodus/ponyc,ponylang/ponyc,cquinn/ponyc,cquinn/ponyc,doublec/ponyc,mkfifo/ponyc,Theodus/ponyc,lukecheeseman/ponyta,jupvfranco/ponyc,ponylang/ponyc,boemmels/ponyc,Praetonus/ponyc,lukecheeseman/ponyta,Perelandric/ponyc,malthe/ponyc,sgebbie/ponyc,kulibali/ponyc,jemc/ponyc,Perelandric/ponyc,kulibali/ponyc,doublec/ponyc,ryanai3/ponyc,CausalityLtd/ponyc,Perelandric/ponyc,mkfifo/ponyc,boemmels/ponyc,cquinn/ponyc,Theodus/ponyc,jemc/ponyc,malthe/ponyc,boemmels/ponyc,ryanai3/ponyc,boemmels/ponyc,mkfifo/ponyc,jupvfranco/ponyc,sgebbie/ponyc,Theodus/ponyc,malthe/ponyc,CausalityLtd/ponyc,dipinhora/ponyc,cquinn/ponyc,sgebbie/ponyc,ponylang/ponyc,ryanai3/ponyc,Praetonus/ponyc,mkfifo/ponyc,dipinhora/ponyc,lukecheeseman/ponyta,Praetonus/ponyc,boemmels/ponyc,CausalityLtd/ponyc,jupvfranco/ponyc,doublec/ponyc,sgebbie/ponyc,malthe/ponyc,jemc/ponyc,jupvfranco/ponyc