Bug#542794: Test case

[Ole Laursen <olau@yayart.com>]

Hi!

Forgot to attach a test case. It's really simple. Install
python-vipscc and run the following (and also attached) Python script:

  from vipsCC import *

  im = VImage.VImage("thisdoesnotexist.png")
  print im.Xsize()

When you open and use a non-existing image file, it segfaults. The
expected result is a Python exception (this used to work). I'm on
Debian testing i386. The backtrace goes like this:

#0  0xb6bc54fd in __cxa_allocate_exception () from /usr/lib/libstdc++.so.6
#1  0xb79e50f6 in vips::verror () from /usr/lib/libvipsCC.so.15
#2  0xb79cc4cc in vips::VImage::VImage () from /usr/lib/libvipsCC.so.15
#3  0xb7a1b7e2 in ?? ()
   from /usr/lib/python2.5/site-packages/vipsCC/vimagemodule.so
#4  0x0805d447 in PyObject_Call ()


Ole

from vipsCC import *

im = VImage.VImage("thisdoesnotexist.png")
print im.Xsize()