Fix MODULE UNLOAD crash and/or wrong error message.
Fix MODULE UNLOAD crash and/or wrong error message.

ton31337/redis,charsyam/redis,oranagra/redis,sunheehnus/redis,ton31337/redis,yossigo/redis,arijitvt/redis,antirez/redis,hgl888/redis,neomantra/redis,Sciumo/redis,ton31337/redis,charsyam/redis,colstrom/redis,spinlock/redis,soveran/redis,pmem/redis,OmarQunsul/graph-redis,GitHubMota/redis,yossigo/redis,oranagra/redis,ctripcorp/redis,pmem/redis,PKRoma/redis,Sciumo/redis,YongMan/redis,Markgorden/redis,kensou97/redis,badboy/redis,charsyam/redis,rogerchina/redis,YongMan/redis,spinlock/redis,pmem/redis,oranagra/redis,badboy/redis,zguangyu/redis,dreamquster/redis,badboy/redis,sunheehnus/redis,charsyam/redis,neomantra/redis,arijitvt/redis,ofirluzon/redis,nnog/redis,zguangyu/redis,sunheehnus/redis,Markgorden/redis,soveran/redis,colstrom/redis,Markgorden/redis,h0x91b/redis,yossigo/redis,OmarQunsul/graph-redis,rogerchina/redis,GitHubMota/redis,h0x91b/redis,ofirluzon/redis,soveran/redis,OmarQunsul/graph-redis,nnog/redis,pmem/redis,neomantra/redis,colstrom/redis,ofirluzon/redis,Markgorden/redis,nnog/redis,rogerchina/redis,PKRoma/redis,dreamquster/redis,soloestoy/redis,soloestoy/redis,GitHubMota/redis,h0x91b/redis,ctripcorp/redis,h0x91b/redis,hgl888/redis,hgl888/redis,neomantra/redis,ctripcorp/redis,antirez/redis,Sciumo/redis,soloestoy/redis,hgl888/redis,YongMan/redis,GitHubMota/redis,neomantra/redis,ton31337/redis,soveran/redis,ofirluzon/redis,kensou97/redis,nnog/redis,dreamquster/redis,ctripcorp/redis,Sciumo/redis,charsyam/redis,colstrom/redis,oranagra/redis,soloestoy/redis,antirez/redis,spinlock/redis,spinlock/redis,antirez/redis,PKRoma/redis,rogerchina/redis,zguangyu/redis,OmarQunsul/graph-redis,zguangyu/redis,PKRoma/redis,kensou97/redis,oranagra/redis,dreamquster/redis,arijitvt/redis,sunheehnus/redis,arijitvt/redis,kensou97/redis,PKRoma/redis,yossigo/redis,badboy/redis,yossigo/redis,ofirluzon/redis,YongMan/redis,soloestoy/redis