Removed use of 'assert' in decoder.hpp.
Removed use of 'assert' in decoder.hpp.

Review: https://reviews.apache.org/r/32345

zmalik/mesos,andschwa/mesos,neilconway/mesos,jpeach/mesos,kaysoky/mesos,andschwa/mesos,Aman-Jain-14/customizedMesos,abudnik/mesos,Aman-Jain-14/customizedMesos,asamerh4/mesos,yuquanshan/customizedMesos,neilconway/mesos,kaysoky/mesos,neilconway/mesos,asamerh4/mesos,zmalik/mesos,yuquanshan/customizedMesos,andschwa/mesos,zmalik/mesos,craimbert/mesos,verizonlabs/mesos,zmalik/mesos,Gilbert88/mesos,gsantovena/mesos,craimbert/mesos,yuquanshan/customizedMesos,craimbert/mesos,asamerh4/mesos,neilconway/mesos,Aman-Jain-14/customizedMesos,craimbert/mesos,Gilbert88/mesos,kaysoky/mesos,neilconway/mesos,dforsyth/mesos,jpeach/mesos,abudnik/mesos,verizonlabs/mesos,kaysoky/mesos,dforsyth/mesos,andschwa/mesos,neilconway/mesos,gsantovena/mesos,chhsia0/mesos,verizonlabs/mesos,chhsia0/mesos,dforsyth/mesos,craimbert/mesos,asamerh4/mesos,yuquanshan/customizedMesos,verizonlabs/mesos,yuquanshan/customizedMesos,jpeach/mesos,reneploetz/mesos,craimbert/mesos,chhsia0/mesos,chhsia0/mesos,dforsyth/mesos,yuquanshan/customizedMesos,dforsyth/mesos,Gilbert88/mesos,zmalik/mesos,andschwa/mesos,chhsia0/mesos,andschwa/mesos,abudnik/mesos,kaysoky/mesos,gsantovena/mesos,andschwa/mesos,Aman-Jain-14/customizedMesos,asamerh4/mesos,reneploetz/mesos,gsantovena/mesos,Aman-Jain-14/customizedMesos,gsantovena/mesos,craimbert/mesos,jpeach/mesos,dforsyth/mesos,chhsia0/mesos,gsantovena/mesos,verizonlabs/mesos,verizonlabs/mesos,abudnik/mesos,reneploetz/mesos,gsantovena/mesos,jpeach/mesos,Gilbert88/mesos,dforsyth/mesos,kaysoky/mesos,abudnik/mesos,abudnik/mesos,chhsia0/mesos,reneploetz/mesos,kaysoky/mesos,abudnik/mesos,neilconway/mesos,zmalik/mesos,Aman-Jain-14/customizedMesos,Gilbert88/mesos,verizonlabs/mesos,zmalik/mesos,reneploetz/mesos,reneploetz/mesos,yuquanshan/customizedMesos,Gilbert88/mesos,Aman-Jain-14/customizedMesos,jpeach/mesos,asamerh4/mesos,reneploetz/mesos,asamerh4/mesos,jpeach/mesos,Gilbert88/mesos