From 39126d5707cacc9dce17c0b74417bf2643ae7c42 Mon Sep 17 00:00:00 2001
From: Glenn Randers-Pehrson <glennrp at users.sourceforge.net>
Date: Thu, 30 Jan 2014 15:37:05 -0600
Subject: [PATCH] [libpng12] Quiet an uninitialized memory warning from VC2013
 in png_get_png().

---
 ANNOUNCE  | 37 ++++++++++++++++++++-----------------
 CHANGES   |  3 +++
 pngread.c | 16 +++++-----------
 3 files changed, 28 insertions(+), 28 deletions(-)

diff --git a/ANNOUNCE b/ANNOUNCE
index fd65b614..6e0db8c3 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,5 +1,5 @@
 
-Libpng 1.2.51rc01 - January 28, 2014
+Libpng 1.2.51rc02 - January 30, 2014
 
 This is not intended to be a public release.  It will be replaced
 within a few weeks by a public version or by another test version.
@@ -9,36 +9,36 @@ Files available for download:
 Source files with LF line endings (for Unix/Linux) and with a
 "configure" script
 
-   libpng-1.2.51rc01.tar.xz (LZMA-compressed, recommended)
-   libpng-1.2.51rc01.tar.gz
-   libpng-1.2.51rc01.tar.bz2
+   libpng-1.2.51rc02.tar.xz (LZMA-compressed, recommended)
+   libpng-1.2.51rc02.tar.gz
+   libpng-1.2.51rc02.tar.bz2
 
 Source files with LF line endings (for Unix/Linux) without the
 "configure" script
 
-   libpng-1.2.51rc01-no-config.tar.xz (LZMA-compressed, recommended)
-   libpng-1.2.51rc01-no-config.tar.gz
-   libpng-1.2.51rc01-no-config.tar.bz2
+   libpng-1.2.51rc02-no-config.tar.xz (LZMA-compressed, recommended)
+   libpng-1.2.51rc02-no-config.tar.gz
+   libpng-1.2.51rc02-no-config.tar.bz2
 
 Source files with CRLF line endings (for Windows), without the
 "configure" script
 
-   lp1251r01.zip
-   lp1251r01.7z
-   lp1251r01.tar.bz2
+   lp1251r02.zip
+   lp1251r02.7z
+   lp1251r02.tar.bz2
 
 Project files
 
-   libpng-1.2.51rc01-project-netware.zip
-   libpng-1.2.51rc01-project-wince.zip
+   libpng-1.2.51rc02-project-netware.zip
+   libpng-1.2.51rc02-project-wince.zip
 
 Other information:
 
-   libpng-1.2.51rc01-README.txt
-   libpng-1.2.51rc01-KNOWNBUGS.txt
-   libpng-1.2.51rc01-LICENSE.txt
-   libpng-1.2.51rc01-Y2K-compliance.txt
-   libpng-1.2.51rc01-[previous version]-diff.txt
+   libpng-1.2.51rc02-README.txt
+   libpng-1.2.51rc02-KNOWNBUGS.txt
+   libpng-1.2.51rc02-LICENSE.txt
+   libpng-1.2.51rc02-Y2K-compliance.txt
+   libpng-1.2.51rc02-[previous version]-diff.txt
 
 Changes since the last public release (1.2.50):
 
@@ -66,6 +66,9 @@ version 1.2.51beta05 [January 22, 2014]
 version 1.2.51rc01 [January 28, 2014]
   No changes.
 
+version 1.2.51rc02 [January 30, 2014]
+  Quiet an uninitialized memory warning from VC2013 in png_get_png().
+
 (subscription required; visit
 https://lists.sourceforge.net/lists/listinfo/png-mng-implement
 to subscribe) or to glennrp at users.sourceforge.net
diff --git a/CHANGES b/CHANGES
index b20aad1f..dc311285 100644
--- a/CHANGES
+++ b/CHANGES
@@ -2801,6 +2801,9 @@ version 1.2.51beta05 [January 22, 2014]
 version 1.2.51rc01 [January 28, 2014]
   No changes.
 
+version 1.2.51rc02 [January 30, 2014]
+  Quiet an uninitialized memory warning from VC2013 in png_get_png().
+
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
 https://lists.sourceforge.net/lists/listinfo/png-mng-implement
diff --git a/pngread.c b/pngread.c
index 69ee464b..f0a54c1f 100644
--- a/pngread.c
+++ b/pngread.c
@@ -1,8 +1,8 @@
 
 /* pngread.c - read a PNG file
  *
- * Last changed in libpng 1.2.48 [March 8, 2012]
- * Copyright (c) 1998-2012 Glenn Randers-Pehrson
+ * Last changed in libpng 1.2.51 [%RDATE%]
+ * Copyright (c) 1998-2014 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
  *
@@ -1405,7 +1405,7 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
    if (transforms & PNG_TRANSFORM_EXPAND)
       if ((png_ptr->bit_depth < 8) ||
           (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) ||
-          (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)))
+          (info_ptr->valid & PNG_INFO_tRNS))
          png_set_expand(png_ptr);
 #endif
 
@@ -1424,14 +1424,8 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
     * [0,65535] to the original [0,7] or [0,31], or whatever range the
     * colors were originally in:
     */
-   if ((transforms & PNG_TRANSFORM_SHIFT)
-       && png_get_valid(png_ptr, info_ptr, PNG_INFO_sBIT))
-   {
-      png_color_8p sig_bit;
-
-      png_get_sBIT(png_ptr, info_ptr, &sig_bit);
-      png_set_shift(png_ptr, sig_bit);
-   }
+   if ((transforms & PNG_TRANSFORM_SHIFT) && (info_ptr->valid & PNG_INFO_sBIT))
+      png_set_shift(png_ptr, &info_ptr->sig_bit);
 #endif
 
 #ifdef PNG_READ_BGR_SUPPORTED