richedit: Some minor fixes for wrapping.

[Dylan Smith]

Consecutive tabs now get broken up into separate lines when they need
to be wrapped, instead of being ignored at the end.

The first line of a paragraph with whitespace, and the first causing a
wordwrap will get wrapped properly.  Previously this type of line would
never get wrapped no matter how long it is.

The end of paragraph run should never overflow into a line by itself.

The above changes are for consistency with native richedit controls.

Removed some redundant lines.  Lines in ME_WrapHandleRun were removed
because ME_CalcRunExtent is already called unconditionally just before
it in the call to ME_WrapSizeRun.  Lines in ME_WrapTextParagraph were
removed because they do the same thing as the call to ME_BeginRow that
follows these lines.
---
 dlls/riched20/wrap.c |   34 +++++++++++++++++++---------------
 1 files changed, 19 insertions(+), 15 deletions(-)
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