Fix a bug when reading ArrayType.
Fix a bug when reading ArrayType.

kgrz/msgp,jfbus/msgp,darvik80/msgp,DrGo/msgp,eliothedeman/msgp,ebfe/msgp,tinylib/msgp,mengzhuo/msgp,appneta/msgp,appneta/msgp,skatsuta/msgp,dockbiz/msgp,tinylib/msgp