Add functions provided by the midend to tell a front end whether GUI
authorsimon <simon@cda61777-01e9-0310-a592-d414129be87e>
Sat, 2 Apr 2011 15:36:30 +0000 (15:36 +0000)
committersimon <simon@cda61777-01e9-0310-a592-d414129be87e>
Sat, 2 Apr 2011 15:36:30 +0000 (15:36 +0000)
commitea6ffc86747062fbbe54d16e6929582f09e4342d
tree11b2abd4e36e1826f4076351d6a0791aabf2584d
parent1463f9f18b6e628e39b83adb445a64333b56ed57
Add functions provided by the midend to tell a front end whether GUI
buttons for undo and redo should currently be greyed out.

git-svn-id: svn://svn.tartarus.org/sgt/puzzles@9139 cda61777-01e9-0310-a592-d414129be87e
devel.but
midend.c
puzzles.h