[gimp] Bug 751089: Part PNG files are not opened properly

[Massimo Valentini <mvalentini src gnome org>]

commit f72f8f20e57ba8abeac3a656b07314a34673776c
Author: Massimo Valentini <mvalentini src gnome org>
Date:   Tue Jun 30 19:41:41 2015 +0200

    Bug 751089: Part PNG files are not opened properly

 plug-ins/common/file-png.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/plug-ins/common/file-png.c b/plug-ins/common/file-png.c
index 44d7aac..2ecee68 100644
--- a/plug-ins/common/file-png.c
+++ b/plug-ins/common/file-png.c
@@ -767,6 +767,7 @@ on_read_error (png_structp     png_ptr,
                          GEGL_RECTANGLE (0, begin, error_data->width, num));
     }
 
+  g_object_unref (error_data->buffer);
   longjmp (png_jmpbuf (png_ptr), 1);
 }
 
@@ -869,6 +870,7 @@ load_image (const gchar  *filename,
     }
 
   png_init_io (pp, fp);
+  png_set_compression_buffer_size (pp, 512);
 
   /*
    * Get the image dimensions and create the image...