coverity/74717: FP: NULL Pointer Dereference

dynamic_buffer_ensure() allocates buf->data; add an assert to make this
clear to coverity.
vim-patch:7.4.450

Problem:    Not all commands that edit another buffer support the +cmd
	    argument.
Solution:   Add the +cmd argument to relevant commands. (Marcin Szamotulski)

https://code.google.com/p/vim/source/detail?r=v7-4-450
vim-patch:7.4.483

Problem:    A 0x80 byte is not handled correctly in abbreviations.
Solution:   Unescape special characters. Add a test. (Christian Brabandt)

https://code.google.com/p/vim/source/detail?r=v7-4-483
vim-patch:7.4.485

Problem:    Abbreviations don't work. (Toothpik)
Solution:   Move the length computation inside the for loop.  Compare against
	    the unescaped key.

https://code.google.com/p/vim/source/detail?r=v7-4-485
vim-patch:7.4.488

Problem:    test_mapping fails for some people.
Solution:   Set the 'encoding' option. (Ken Takata)

https://code.google.com/p/vim/source/detail?r=v7-4-488
vim-patch:7.4.527

Problem:    Still confusing regexp failure and NFA_TOO_EXPENSIVE.
Solution:   NFA changes equivalent of 7.4.526.

https://code.google.com/p/vim/source/detail?r=v7-4-527
Remove long_u: put_bytes(): Refactor.

Remove all long_u instances due to put_bytes() function.

First, function signature is changed this way:
- nr  : long_u --> uintmax_t
    uintmax_t is chosen so that invocations can use any unsigned integer
    type (including size_t) without needing to cast.
- len : int    --> unsigned int
    This is to pass the size in bytes of the previous param, thus an
    unsigned int is enough. All invocations use positive integer
    literals, so change is safe without the need for casts.

Then, function implementation is adapted accordingly.

Last, all invocation points are refactored this way:
- Refactor types to minimize casts.
- Inline declarations (C99 style) in containing function.

All this changes were done with -Wconversion temporarily activated for
spell.c and undo.c, so that we can assert changes are type-safe and do
not introduce any warnings to that respect.
Remove long_u: Passing-by: undo.c: Add to -Wconversion.

Previous commit dropped many -Wconversion warnings in both spell.c and
undo.c. spell.c still has a lot of them (200+). But in undo.c, only a
handful of them remain. Take the chance to eliminate those, too, and add
undo.c to -Wconversion checked files.
Remove long_u: Passing-by: put_time(): Refactor implementation.

put_time() had a complicated implementation, because of having to shift
an 8-byte value in a portable way with old means.
That can be greatly simplified now, using a C99 fixed-size type.
Merge pull request #1715 from elmart/remove-long_u-3

Remove project-specific integer types: long_u. (3)
vim-patch:7.4.521

Problem:    When using "vep" a mark is moved to the next line. (Maxi Padulo,
	    Issue 283)
Solution:   Decrement the line number. (Christian Brabandt)

https://code.google.com/p/vim/source/detail?r=v7-4-521
vim-patch:7.4.536

Problem:    Test 63 fails when using a black&white terminal.
Solution:   Add attributes for a non-color terminal. (Christian Brabandt)

https://code.google.com/p/vim/source/detail?r=v7-4-536
vim-patch:7.4.538

Problem:    Tests fail with small features plus Python.
Solution:   Disallow weird combination of options.  Do not set "fdm" when
	    folding is disabled.

https://code.google.com/p/vim/source/detail?r=v7-4-538
vim-patch:7.4.545

Problem:    Highlighting for multi-line matches is not correct.
Solution:   Stop highlight at the end of the match. (Hirohito Higashi)

https://code.google.com/p/vim/source/detail?r=v7-4-545
vim-patch:7.4.547

Problem:    Using "vit" does not select a multi-byte character at the end
	    correctly.
Solution:   Advance the cursor over the multi-byte character. (Christian
	    Brabandt)

https://code.google.com/p/vim/source/detail?r=v7-4-547
Merge pull request #1722 from fwalch/vim-7.4.488

vim-patch:7.4.483, vim-patch:7.4.485, vim-patch:7.4.488
vim-patch:7.4.486

Problem:    Check for writing to a yank register is wrong.
Solution:   Negate the check. (Zyx).  Also clean up the #ifdefs.

https://code.google.com/p/vim/source/detail?r=v7-4-486
Improvements to vim-patch script.
Merge pull request #1740 from fwalch/improve-vimpatch

Minor improvements to vim-patch script.
Transform global variable really_exiting into static.