Fix a build error
Fix a build error

which occurred when -Pcoverage was not specified

mx657649013/netty,DavidAlphaFox/netty,windie/netty,ngocdaothanh/netty,cnoldtree/netty,carl-mastrangelo/netty,Squarespace/netty,ejona86/netty,tbrooks8/netty,windie/netty,mcobrien/netty,ichaki5748/netty,Spikhalskiy/netty,idelpivnitskiy/netty,mx657649013/netty,yipen9/netty,blucas/netty,cnoldtree/netty,skyao/netty,andsel/netty,KatsuraKKKK/netty,cnoldtree/netty,johnou/netty,tbrooks8/netty,golovnin/netty,kiril-me/netty,maliqq/netty,Techcable/netty,chanakaudaya/netty,Spikhalskiy/netty,joansmith/netty,kiril-me/netty,doom369/netty,KatsuraKKKK/netty,joansmith/netty,Spikhalskiy/netty,johnou/netty,Scottmitch/netty,carl-mastrangelo/netty,imangry/netty-zh,golovnin/netty,chanakaudaya/netty,Scottmitch/netty,netty/netty,gerdriesselmann/netty,SinaTadayon/netty,maliqq/netty,carl-mastrangelo/netty,luyiisme/netty,ichaki5748/netty,artgon/netty,ejona86/netty,gerdriesselmann/netty,louxiu/netty,louxiu/netty,Techcable/netty,fengjiachun/netty,skyao/netty,fengjiachun/netty,joansmith/netty,Scottmitch/netty,Techcable/netty,idelpivnitskiy/netty,johnou/netty,golovnin/netty,joansmith/netty,Scottmitch/netty,bryce-anderson/netty,mikkokar/netty,Squarespace/netty,Squarespace/netty,artgon/netty,ngocdaothanh/netty,ngocdaothanh/netty,windie/netty,zer0se7en/netty,DavidAlphaFox/netty,netty/netty,Squarespace/netty,yrcourage/netty,mcobrien/netty,SinaTadayon/netty,purplefox/netty-4.0.2.8-hacked,yrcourage/netty,s-gheldd/netty,andsel/netty,imangry/netty-zh,Apache9/netty,yipen9/netty,ejona86/netty,NiteshKant/netty,zer0se7en/netty,mx657649013/netty,yrcourage/netty,mikkokar/netty,s-gheldd/netty,andsel/netty,blucas/netty,chanakaudaya/netty,skyao/netty,jchambers/netty,SinaTadayon/netty,jchambers/netty,artgon/netty,mikkokar/netty,jchambers/netty,chanakaudaya/netty,carl-mastrangelo/netty,doom369/netty,yipen9/netty,joansmith/netty,netty/netty,maliqq/netty,johnou/netty,jongyeol/netty,mikkokar/netty,louxiu/netty,jongyeol/netty,maliqq/netty,mikkokar/netty,purplefox/netty-4.0.2.8-hacked,artgon/netty,cnoldtree/netty,mx657649013/netty,luyiisme/netty,doom369/netty,imangry/netty-zh,fenik17/netty,s-gheldd/netty,netty/netty,cnoldtree/netty,fenik17/netty,ichaki5748/netty,imangry/netty-zh,Apache9/netty,Apache9/netty,windie/netty,ichaki5748/netty,KatsuraKKKK/netty,carl-mastrangelo/netty,s-gheldd/netty,ejona86/netty,Techcable/netty,maliqq/netty,idelpivnitskiy/netty,kiril-me/netty,luyiisme/netty,mcobrien/netty,gerdriesselmann/netty,tbrooks8/netty,DavidAlphaFox/netty,luyiisme/netty,windie/netty,ejona86/netty,artgon/netty,SinaTadayon/netty,bryce-anderson/netty,jchambers/netty,fengjiachun/netty,DavidAlphaFox/netty,fengjiachun/netty,jongyeol/netty,ichaki5748/netty,NiteshKant/netty,NiteshKant/netty,Spikhalskiy/netty,mcobrien/netty,NiteshKant/netty,luyiisme/netty,blucas/netty,doom369/netty,tbrooks8/netty,KatsuraKKKK/netty,andsel/netty,doom369/netty,fenik17/netty,skyao/netty,golovnin/netty,mcobrien/netty,idelpivnitskiy/netty,Apache9/netty,bryce-anderson/netty,skyao/netty,idelpivnitskiy/netty,NiteshKant/netty,zer0se7en/netty,Techcable/netty,Apache9/netty,netty/netty,s-gheldd/netty,purplefox/netty-4.0.2.8-hacked,johnou/netty,jongyeol/netty,jchambers/netty,ngocdaothanh/netty,zer0se7en/netty,louxiu/netty,tbrooks8/netty,golovnin/netty,blucas/netty,KatsuraKKKK/netty,yrcourage/netty,yrcourage/netty,SinaTadayon/netty,purplefox/netty-4.0.2.8-hacked,fengjiachun/netty,Squarespace/netty,yipen9/netty,Scottmitch/netty,fenik17/netty,chanakaudaya/netty,kiril-me/netty,blucas/netty,imangry/netty-zh,jongyeol/netty,gerdriesselmann/netty,mx657649013/netty,ngocdaothanh/netty,Spikhalskiy/netty,bryce-anderson/netty,bryce-anderson/netty,andsel/netty,kiril-me/netty,zer0se7en/netty,louxiu/netty,gerdriesselmann/netty,fenik17/netty