[Gimp-developer] Loaded image's title becomes "Untitled"

[tks]

Hello.
I'm writing a new plug-in which enable GIMP to import and export X11 Mouse
Cursor (XMC).
Coding is 80% done, but there is still one bug which I cannot solve.
Whenever I open a cursor file, the title is "Untitled-*".
"Image->Image Properties" shows that "File Name:" and "File Size:" are
empty.
Can anyone fix this? Here is my source code.
http://www.sutv.zaq.ne.jp/linuz/tks/item/file-xmc.c

I also want to make my source code more readable and easy to maintain.
So, if you have any idea, please let me know.
Thanks for reading.
tks
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