### What this PR does / why we need it? [Fix a data conversion bug introduced by [main#4655](3b7eb5179f) ### Does this PR introduce _any_ user-facing change? ### How was this patch tested? - vLLM version: v0.12.0 - vLLM main:ad32e3e19cSigned-off-by: tongyuzhou <tongyuzhou1@huawei.com> Co-authored-by: tongyuzhou <tongyuzhou1@huawei.com> Co-authored-by: weijinqian0 <1184188277@qq.com>