user32: Fix error handling in {Begin,End,}DeferWindowPos() to match Windows behavior.

[Rodrigo Rivas]

This fixes #23187.
---
 dlls/user32/tests/Makefile.in |   1 +
 dlls/user32/tests/defer.c     | 168 ++++++++++++++++++++++++++++++++++++++++++
 dlls/user32/winpos.c          |  14 ++--
 3 files changed, 178 insertions(+), 5 deletions(-)
 create mode 100644 dlls/user32/tests/defer.c
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