#44 Files are not properly closed on Windows.

[Michel Albert]

When I load a video, and use the "File->Close" menu, the file is still in use by avidemux, so I cannot delete it from disk until I close avidemux.

Steps to reproduce:

1. Load a video
2. Close the video using File->Close
3. Try to delete the video from disk.

Observed behaviour: Windows reports the file being in use by avidemux and refuses to delete it.
Expected behaviour: avidemux should release the file handle, so it can be deleted by the OS.

There is a chance, that this is also happening on Linux. But as file-handles work differently, you can delete it even though avidemux still retains a handle to it. Might show up on "lsof" or on "/proc/<pidof avidemux="">/fd" as a deleted file.</pidof>