types: rename local variable (#14578)
types: rename local variable (#14578)


pingcap/tidb,pingcap/tidb,c4pt0r/tidb,Cofyc/tidb,pingcap/tidb,kyle-wang/tidb,coocood/tidb,kyle-wang/tidb,XuHuaiyu/tidb,pingcap/tidb,ngaut/tidb,ngaut/tidb,kyle-wang/tidb,c4pt0r/tidb,c4pt0r/tidb,kyle-wang/tidb,EvilMcJerkface/tidb,EvilMcJerkface/tidb,c4pt0r/tidb,ngaut/tidb,c4pt0r/tidb,pingcap/tidb,pingcap/tidb,XuHuaiyu/tidb,Cofyc/tidb,ngaut/tidb,kyle-wang/tidb,kyle-wang/tidb,ngaut/tidb,coocood/tidb,c4pt0r/tidb,ngaut/tidb