fix v-for range edge cases (fix #2265)
fix v-for range edge cases (fix #2265)

fergaldoyle/vue,diermengdierme/vue,shupan123/vue-fixed-type,fergaldoyle/vue,fergaldoyle/vue,th0r/vue,shupan123/vue-fixed-type,diermengdierme/vue,shupan123/vue-fixed-type,th0r/vue,th0r/vue,diermengdierme/vue