[Bug 56153] New: Possible nullpointer dereference in wow64_NtUserUnpackDDEMessage (Coverity)

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=56153

Bug ID: 56153
           Summary: Possible nullpointer dereference in
                    wow64_NtUserUnpackDDEMessage (Coverity)
           Product: Wine
           Version: 9.0-rc3
          Hardware: x86-64
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

In wow64_NtUserUnpackDDEMessage we have the following code:
> if (!params->result) NtCallbackReturn( &result, sizeof(result), TRUE );
> *params->result = result;

Not 100% sure what is intended here, but it doesn't look right.

Coverity link :
https://scan5.scan.coverity.com/reports.htm#v60945/p10088/fileInstanceId=257...