gEDA-dev: new export image window

[Ales Hvezda]

Hi Carlos,

[snip]
>I have changed the export image window so it uses the gtk file selector
>too.

	Nice; way better than my sucky dialog box.  A few compiler
warnings:

i_callbacks.c: In function 'i_callback_file_write_png':
i_callbacks.c:439: warning: unused variable 'img_filename'
i_callbacks.c:438: warning: unused variable 'base'

[snip]
>so I decided to post the patch here. Could anyone test it in gtk2.4?

	Unfortunately, I don't have such a environment handy. :(  However,
it gets tested with gtk+ 2.4.x, please feel free to commit the patch.

	Thanks,

		-Ales