Fix type of argslen in sendSynchronousCommand().
Fix type of argslen in sendSynchronousCommand().

Related to #5037.

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