segfault: write_view() with png_tag

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** VERSION INFORMATION
io_new rc2
libpng 1.2.44
debian squeeze

** PROBLEM DESCRIPTION
Given an image with either zero height or width, write_view(...,png_tag()) 
segfaults after printing a libpng warning:

** GDB OUTPUT
libpng warning: Image height is zero in IHDR
libpng error: Invalid IHDR data

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffb9a06700 (LWP 14501)]
0x00000000009c8984 in png_destroy_write_struct ()
(gdb) bt
#0  0x00000000009c8984 in png_destroy_write_struct ()
#1  0x0000000000523381 in ~writer (this=0x7fffb9a03730, __in_chrg=<value 
optimized out>) at 
../../../ext/boost_gil_extensions/boost/gil/extension/io_new/formats/png/write.h
pp:62
#2  0x000000000051f402 in 
boost::gil::write_view<boost::gil::detail::file_stream_device<boost::gil::png_ta
g>, 
boost::gil::image_view<boost::gil::memory_based_2d_locator<boost::gil::memory_ba
sed_step_iterator<boost::gil::planar_pixel_iterator<unsigned char*, 
boost::mpl::vector3<boost::gil::red_t, boost::gil::green_t, boost::gil::blue_t> 
> > > >, boost::gil::png_tag> (device=..., view=..., tag=..., ptr=0x0)
    at ../../../ext/boost_gil_extensions/boost/gil/extension/io_new/detail/write_view.hpp:55
#3  0x000000000051b137 in boost::gil::write_view<_IO_FILE*, 
boost::gil::image_view<boost::gil::memory_based_2d_locator<boost::gil::memory_ba
sed_step_iterator<boost::gil::planar_pixel_iterator<unsigned char*, 
boost::mpl::vector3<boost::gil::red_t, boost::gil::green_t, boost::gil::blue_t> 
> > > >, boost::gil::png_tag> (device=@0x7fffb9a03960, view=..., tag=..., 
ptr=0x0)
    at ../../../ext/boost_gil_extensions/boost/gil/extension/io_new/detail/write_view.hpp:82
...
...

Original issue reported on code.google.com by [email protected] on 1 Mar 2013 at 2:40