riched20: Set control content in WM_CREATE message (try2)

[Piotr Caban]

try2:
  - don't crash if CREATESTRUCT is not passed

---
  dlls/riched20/editor.c       | 24 ++++++++++++++++++++++++
  dlls/riched20/tests/editor.c | 38 ++++++++++++++++++++++++++++++++++++++
  2 files changed, 62 insertions(+)


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