Improve image size fix

Resolves: #2234740

djvulibre-3.5.27-check-image-size.patch

@@ -2,12 +2,14 @@ diff --git a/libdjvu/IW44Image.cpp b/libdjvu/IW44Image.cpp
 index e8d4b44..aa3d554 100644
 --- a/libdjvu/IW44Image.cpp
 +++ b/libdjvu/IW44Image.cpp
-@@ -678,7 +678,11 @@ IW44Image::Map::image(signed char *img8, int rowsize, int pixsep, int fast)
+@@ -678,9 +678,13 @@ IW44Image::Map::image(signed char *img8, int rowsize, int pixsep, int fast)
+   // Allocate reconstruction buffer
+   short *data16;
    size_t sz = bw * bh;
-   if (sz / (size_t)bw != (size_t)bh) // multiplication overflow
-     G_THROW("IW44Image: image size exceeds maximum (corrupted file?)");
 +  if (sz == 0)
 +    G_THROW("IW44Image: zero size image (corrupted file?)");
+   if (sz / (size_t)bw != (size_t)bh) // multiplication overflow
+     G_THROW("IW44Image: image size exceeds maximum (corrupted file?)");
    GPBuffer<short> gdata16(data16,sz);
 +  if (data16 == NULL)
 +    G_THROW("IW44Image: unable to allocate image data");

djvulibre.spec

@@ -3,7 +3,7 @@
 Summary: DjVu viewers, encoders, and utilities
 Name: djvulibre
 Version: 3.5.28
-Release: 3%{?dist}
+Release: 4%{?dist}
 License: GPLv2+
 URL: http://djvu.sourceforge.net/
 Source0: http://downloads.sourceforge.net/djvu/%{name}-%{version}.tar.gz
@@ -181,6 +181,10 @@ fi
 
 
 %changelog
+* Tue May 07 2024 Marek Kasik <mkasik@redhat.com> - 3.5.28-4
+- Improve image size fix
+- Resolves: #2234740
+
 * Fri Mar 18 2022 Marek Kasik <mkasik@redhat.com> - 3.5.28-3
 - Initial EPEL 8 release
 - Resolves: #1739168