fix bug in zscal function
fix bug in zscal function

memset can not be used in zscal because of
the stride parameters.

Signed-off-by: Wu Zhigang <1c39143c9e8f6c648eb0f5841e55a470d45e93d6@starfivetech.com>

xianyi/OpenBLAS,xianyi/OpenBLAS,xianyi/OpenBLAS,xianyi/OpenBLAS,xianyi/OpenBLAS,xianyi/OpenBLAS,xianyi/OpenBLAS,xianyi/OpenBLAS