Ensure req.body is defined
Ensure req.body is defined

If for whatever reason the user hasn't included `bodyParser()`, trying to access `req.body` will cause a crash.  This guards against this scenario.
carlitux/koa-async-validator,ctavan/express-validator,Jakeii/express-validator,supasate/express-validator,AndrasEszes/express-validator,phuson/express-validator,h3dx0/express-validator,jg3526/express-validator,ctavan/express-validator,ghostRider1124/express-validator