Update geohash.c
Update geohash.c

fix geohasEncode bug when step > 31
spinlock/redis,oranagra/redis,ctripcorp/redis,ofirluzon/redis,oranagra/redis,spinlock/redis,ctripcorp/redis,ofirluzon/redis,oranagra/redis,neomantra/redis,nnog/redis,PKRoma/redis,ofirluzon/redis,antirez/redis,nnog/redis,nnog/redis,PKRoma/redis,yossigo/redis,pmem/redis,antirez/redis,oranagra/redis,spinlock/redis,charsyam/redis,neomantra/redis,oranagra/redis,PKRoma/redis,ctripcorp/redis,soloestoy/redis,GitHubMota/redis,soveran/redis,antirez/redis,PKRoma/redis,soveran/redis,soloestoy/redis,charsyam/redis,GitHubMota/redis,yossigo/redis,spinlock/redis,GitHubMota/redis,nnog/redis,yossigo/redis,neomantra/redis,ofirluzon/redis,neomantra/redis,PKRoma/redis,soveran/redis,pmem/redis,antirez/redis,pmem/redis,charsyam/redis,ctripcorp/redis,soloestoy/redis,GitHubMota/redis,soloestoy/redis,charsyam/redis,yossigo/redis,soloestoy/redis,pmem/redis,yossigo/redis,charsyam/redis,soveran/redis,neomantra/redis,ofirluzon/redis