[BUG_FIXED] Fix crash issue on quit Notepad++ while session snapshot period backup feature is on.

git-svn-id: svn://svn.tuxfamily.org/svnroot/notepadplus/repository/trunk@1286 f5eea248-9336-0410-98b8-ebc06183d4e3
[NEW_FEATURE] Smart Indent (in progress).

git-svn-id: svn://svn.tuxfamily.org/svnroot/notepadplus/repository/trunk@1287 f5eea248-9336-0410-98b8-ebc06183d4e3
[FIX] Fix typo.

git-svn-id: svn://svn.tuxfamily.org/svnroot/notepadplus/repository/trunk@1288 f5eea248-9336-0410-98b8-ebc06183d4e3