updated to 7.4.729

updated to 7.4.729

7.4.713  wrong condition for #ifdef
7.4.714  illegal memory access when there are illegal bytes
7.4.715  invalid memory access when there are illegal bytes
7.4.716  ":substitute" flags are not always remembered
7.4.717  ":let list += list" can change a locked list
7.4.718  quickfix autocommands cannot get the current title value
7.4.719  overflow when adding MAXCOL to a pointer
7.4.720  can't build with Visual Studio 2015
7.4.721  empty lines do not have Visual highligthing if 'list' set
7.4.722  0x202f is not recognized as a non-breaking space character
7.4.723  for indenting, finding the C++ baseclass can be slow
7.4.724  vim icon does not show in Windows context menu (issue 249)
7.4.725  ":call setreg('"', [])" reports an internal error
7.4.726  (after 7.4.724) cannot build GvimExt
7.4.727  (after 7.4.724) cannot build GvimExt with MingW
7.4.728  can't build with some version of Visual Studio 2015
7.4.729  (after 7.4.721) occasional crash with 'list' set