[34/44] richedit: prevented assertion failures from reading richtext tables

[Dylan Smith]

There were some assertions that were failing as I was trying use tables
that weren't valid rich text, and in some cases were valid rich text.
For instance, a table definition can appear after the cell contents
according to the rich text specifications, but streaming this in caused
assertions errors.

I made other changes that prevented assertion failures that I was
getting, and tried to handle the cases as similarily to the native
richedit controls as possible.
---
 dlls/riched20/caret.c   |    3 +-
 dlls/riched20/editor.c  |  138 +++++++++++++++++++++++++++++++++++++----------
 dlls/riched20/editstr.h |    1 +
 dlls/riched20/list.c    |    7 ++-
 dlls/riched20/para.c    |   19 ++++---
 dlls/riched20/reader.c  |   20 ++++++-
 dlls/riched20/rtf.h     |    2 +
 dlls/riched20/undo.c    |    1 +
 8 files changed, 149 insertions(+), 42 deletions(-)
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