Fix regression causing EXEC to appear in the slow log.
Fix regression causing EXEC to appear in the slow log.

This was recently introduced with PR #6266.

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