A new release

[MikeJ]

Just had a crash while I was literally doing nothing but staring at the screen trying to decide what to do next. I had just done several undos and then stopped for a bit and poof:

Dump written 2014-4-10_17-45
Version: 1.5.3
Window: autosaver
Reason: function_clause

Short stack trace:
[]

Long stack trace:
[{gb_trees,get_1,[current_view,nil],[{file,"gb_trees.erl"},{line,239}]},
{wings_view,export_views,1,[{file,"wings_view.erl"},{line,1391}]},
{wings_ff_wings,export,2,[{file,"wings_ff_wings.erl"},{line,628}]},
{wings_file,autosave,1,[{file,"wings_file.erl"},{line,589}]},
{wings_file,autosave_event,3,[{file,"wings_file.erl"},{line,574}]},
{wings_wm,handle_event,3,[{file,"wings_wm.erl"},{line,825}]},
{wings_wm,send_event,2,[{file,"wings_wm.erl"},{line,797}]},
{wings_wm,do_dispatch,2,[{file,"wings_wm.erl"},{line,698}]}]