updated to 7.4.083

updated to 7.4.083

7.4.062  (after 7.4.061) wrong configure check for AvailabilityMacros.h
7.4.063  crash when using invalid key in Python dictionary
7.4.064  in Visual block mode replacing with CR does not break lines
7.4.065  the character typed at the hit-enter prompt is recorded twice
7.4.066  MS-Windows: swap file name wrong if colon in file name
7.4.067  CTRL-\ CTRL-O moves the cursor after inserting comment leader
7.4.068  cannot build Vim on Mac with non-Apple compilers
7.4.069  cannot right shift comment lines starting with #
7.4.070  (after 7.4.069) can't compile with tiny features
7.4.071  (after 7.4.069) passing limits around too often
7.4.072  crash when using Insert mode completion
7.4.073  setting undolevels for one buffer changes undo in another
7.4.074  when undo'ing all and making a change, undo structure is wrong
7.4.075  locally setting 'undolevels' is not tested
7.4.076  "cgn" does not wrap around the end of the file
7.4.078  MSVC 2013 is not supported
7.4.079  a script cannot detect whether 'hlsearch' highlighting is on
7.4.080  (after 7.4.079) missing documentation for v:hlsearch
7.4.081  (after 7.4.078) wrong logic when ANALYZE is "yes"
7.4.082  using "gf" in a changed buffer suggests adding "!"
7.4.083  hard to avoid adding a used pattern to the search history