wordpad: Empty the richedit undo buffer on creation.

[Dylan Smith]

Two calls to set_default_font are made during creation of the main
windows, which send an EM_SETCHARFORMAT to the rich edit control. This
results in the undo buffer being having two transactions to undo at the
start of the program.

The fix is simply to empty the undo buffer after these undo items are
added to the rich edit control.
---
 programs/wordpad/wordpad.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
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