Assert that setDeferredAggregateLen isn't called with negative value
Assert that setDeferredAggregateLen isn't called with negative value

In case the redis is about to return broken reply we want to crash
with assert so that we are notified about the bug. see #7687.

soloestoy/redis,oranagra/redis,charsyam/redis,oranagra/redis,neomantra/redis,oranagra/redis,ofirluzon/redis,PKRoma/redis,yossigo/redis,yossigo/redis,soloestoy/redis,ctripcorp/redis,neomantra/redis,charsyam/redis,antirez/redis,charsyam/redis,PKRoma/redis,yossigo/redis,antirez/redis,ofirluzon/redis,ctripcorp/redis,oranagra/redis,ofirluzon/redis,charsyam/redis,neomantra/redis,ctripcorp/redis,oranagra/redis,soloestoy/redis,charsyam/redis,ofirluzon/redis,soloestoy/redis,yossigo/redis,neomantra/redis,antirez/redis,PKRoma/redis,ofirluzon/redis,PKRoma/redis,antirez/redis,ctripcorp/redis,PKRoma/redis,yossigo/redis,neomantra/redis,soloestoy/redis