Bug fix: Disable Vim's special handling of initial, empty buffer

See issue #28 on GitHub:
  #28

Author: xolox

addon-info.json

@@ -0,0 +1 @@
+{"vim_script_nr": 3150, "dependencies": {"vim-misc": {}}, "homepage": "http://peterodding.com/code/vim/session", "name": "vim-session"}

autoload/xolox/session.vim

@@ -3,7 +3,7 @@
 " Last Change: June 22, 2013
 " URL: http://peterodding.com/code/vim/session/
 
-let g:xolox#session#version = '2.4'
+let g:xolox#session#version = '2.4.1'
 
 " Public API for session persistence. {{{1
 
@@ -204,6 +204,12 @@ function! s:state_filter(line) " {{{3
     " when :mksession adds corresponding :argglobal and/or :argument commands
     " to the session script.
     return '" ' . a:line
+  elseif a:line =~ "^\\s*silent exe 'bwipe ' \\. s:wipebuf$"
+    " Disable Vim's special handling of the initial, empty buffer because it
+    " breaks restoring of special windows with content generated by a Vim
+    " plug-in. The :mksession command doesn't have this problem because it
+    " simply doesn't support buffers with generated contents...
+    return '" ' . a:line
   else
     return a:line
   endif