[PATCH v4] user32: Implement DM_REPOSITION message

[katahiromz .]

See attachment.

[Marvin]

Hi,

While running your changed tests, I think I found new failures.
Being a bot and all I'm not very good at pattern recognition, so I might be
wrong, but could you please double-check?

Full results can be found at:
https://testbot.winehq.org/JobDetails.pl?Key=59375

Your paranoid android.

=== debian10 (build log) ===

../../../wine/include/winuser.h:3911:61: error: ‘GetWindowLong_must_be_suffixed_with_W_or_A_in_this_context’ undeclared (first use in this function)
../../../wine/include/winuser.h:3911:61: error: expected ‘)’ before ‘GetWindowLong_must_be_suffixed_with_W_or_A_in_this_context’
Task: The win32 build failed

=== debian10 (build log) ===

../../../wine/include/winuser.h:3911:61: error: ‘GetWindowLong_must_be_suffixed_with_W_or_A_in_this_context’ undeclared (first use in this function)
../../../wine/include/winuser.h:3911:61: error: expected ‘)’ before ‘GetWindowLong_must_be_suffixed_with_W_or_A_in_this_context’
Task: The wow64 build failed