File libpng-1.2.31-CVE-2009-2042.patch of Package libpng12-0

--- libpng-1.2.31/pngrutil.c
+++ libpng-1.2.31/pngrutil.c
@@ -3196,6 +3196,8 @@
    {
      png_free(png_ptr, png_ptr->big_row_buf);
      png_ptr->big_row_buf = (png_bytep)png_malloc(png_ptr, row_bytes+64);
+     if (png_ptr->interlaced)
+       png_memset(png_ptr->big_row_buf, 0, row_bytes+64);
      png_ptr->row_buf = png_ptr->big_row_buf+32;
      png_ptr->old_big_row_buf_size = row_bytes+64;
    }