updated to 7.4.537

updated to 7.4.537

7.4.517  cursor may not end up in the right place on a wrapping line
7.4.518  using status line height in width computations
7.4.519  (after 7.4.497) crash when using syntax highlighting
7.4.520  Sun PCK locale is not recognzed
7.4.521  when using "vep" a mark is moved to the next line
7.4.522  specifying wrong buffer size for GetLongPathName()
7.4.523  copy/paste no longer works is X11 server is restarted
7.4.524  when using ":ownsyntax" spell checking is messed up
7.4.525  map() leaks memory when there is an error in the expression
7.4.526  matchstr() fails on long text
7.4.527  still confusing regexp failure and NFA_TOO_EXPENSIVE
7.4.528  crash when using matchadd()
7.4.529  no test for what 7.4.517 fixes
7.4.530  many commands take count/range that is not using line numbers
7.4.531  comments about parsing an Ex command are wrong
7.4.532  when using 'incsearch' "2/pattern/e" highlights first match
7.4.533  ":hardcopy" leaks memory in case of errors
7.4.534  warnings when compiling if_ruby.c
7.4.535  (after 7.4.530) can't build with tiny features
7.4.536  test 63 fails when using a black&white terminal
7.4.537  value of v:hlsearch reflects an internal variable