Update replay-stocks.sp

[Nairdaa]

fix logic behind testing if it works or not and when to actually throw an error

[rtldg]

If OpenFile failed then fTest would be null and CloseHandle(null) is okay to do so there's not actually anything broken here although the logic isn't that clear

[Nairdaa]

Closing a handle should only be done if it was validly opened. Calling CloseHandle on null may not cause a crash, but it leads to unnecessary function calls.

The "updated code" fixes the "issue" by ensuring that it checks if the file was successfully opened before attempting to close it.

[kidfearless]

Looks good, merge it