Fix memleak in bitfieldCommand
Fix memleak in bitfieldCommand

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