Fix check reply argument type #53
                
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7days-golang/gee-rpc/day3-service/service.go
Line 75 in cf36443
这里只检验了reply Argument是否为导出/内置类型, 没有检验其是否为指针
按照net/rpc的接口, 这是无法Register进入services的
是否应该加上检查是否为指针的操作?