Bug#333733: mysterious source file

[Tim Van Holder <tim.vanholder@anubex.com>]

Note that in the gcc subversion repository, the file listed in the
assertion does not exist for the 4.0.2 release tag.
In the 4.0.2 release, GtkImage is in a pure Java file; the jni tree only
has GtkImagePainter.

See:

http://gcc.gnu.org/viewcvs/tags/gcc_4_0_2_release/libjava/jni/gtk-peer/
and
http://gcc.gnu.org/viewcvs/tags/gcc_4_0_2_release/libjava/gnu/java/awt/peer/gtk/

So this seems to be a debian packaging problem, with a non-4.0.2
libgcj marked as 4.0.2.
In fact, the jni/..._GtkImage.c isn't in 4.0.0/4.0.1 either, nor is it
in 4.1 (where the entire jni tree seems to have been removed), so I'm
at a loss as to where it comes from.