!767 [HUST CSE] fs/ntfs3: Aolve errors caused by uninitialized variables

Merge Pull Request from: @lyyue233 
 
issue:
[#I72XT8](https://gitee.com/openeuler/kernel/issues/I72XT8)
Uninitialized variables can cause various errors in a program, such as unexpected behavior, segmentation faults, or even security vulnerabilities.

To avoid these errors, we should always initialize variables before using them.Initialize variable “ err ” to address potential issues. 
 
Link:https://gitee.com/openeuler/kernel/pulls/767

 

Reviewed-by: Kevin Zhu <zhukeqian1@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>
Acked-by: Zheng Zengkai <zhengzengkai@huawei.com>