updated to 7.4.796

updated to 7.4.796

7.4.765  (after 7.4.754) CTRL-A/CTRL-X in Visual mode do not work well
7.4.766  (after 7.4.757) bg color check does not work on Tera Term
7.4.767  --remote-tab-silent can fail on MS-Windows
7.4.768  :diffoff only works properly once
7.4.769  (after 7.4 768) behavior of :diffoff is not tested
7.4.770  (after 7.4.766) different bg color response is not ignored
7.4.771  search wrong when multi-byte character at the start position
7.4.772  Racket 6.2 is not supported on MS-Windows
7.4.773  'langmap' is used in cmdline mode when checking for mappings
7.4.774  it's difficult to get info about the completed item
7.4.775  it is not possible to avoid using the first item of completion
7.4.776  equivalence class for 'd' does not work correctly
7.4.777  the README file doesn't look nice on github
7.4.778  Coverity warns for uninitialized variable
7.4.779  cursor moves when using CTRL-A in line without a number
7.4.780  compiler complains about uninitialized and clobbered variables
7.4.781  line2byte() returns one less when 'bin' and 'noeol' are set
7.4.782  still a few problems with CTRL-A and CTRL-X in Visual mode
7.4.783  copy_chars() and copy_spaces() are inefficient
7.4.784  using both "noinsert" and "noselect" in 'completeopt' fails
7.4.785  automatically adding the missing EOL may cause problems
7.4.786  it is not possible for a plugin to adjust to a changed setting
7.4.787  (after 7.4.786) snprintf() isn't available everywhere
7.4.788  (after 7.4.786) can't build without the crypt feature
7.4.789  (after 7.4.788) using freed memory and crash
7.4.790  (after 7.4.786) test fails without the autochdir feature
7.4.791  the buffer list can be too long to list
7.4.792  can only conceal text by defining syntax items
7.4.793  can't specify when not to ring the bell
7.4.794  Visual Studio 2015 is not recognized
7.4.795  the 'fixeol' option is not copied to a new window
7.4.796  warning from 64 bit compiler