riched20: Don't mess with the caret if we don't have focus.

[Huw Davies]

---
 dlls/riched20/caret.c   |   17 ++++++++++++-----
 dlls/riched20/editor.c  |    3 +++
 dlls/riched20/editstr.h |    1 +
 3 files changed, 16 insertions(+), 5 deletions(-)
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