Imported from libpng-1.2.2beta1.tar
diff --git a/png.h b/png.h
index 77fc420..a27de57 100644
--- a/png.h
+++ b/png.h
@@ -1,7 +1,7 @@
 
 /* png.h - header file for PNG reference library
  *
- * libpng version 1.2.1 - December 12, 2001
+ * libpng version 1.2.2beta1 - February 22, 2002
  * Copyright (c) 1998-2001 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.)
@@ -9,7 +9,7 @@
  * Authors and maintainers:
  *  libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
  *  libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger
- *  libpng versions 0.97, January 1998, through 1.2.1 - December 12, 2001: Glenn
+ *  libpng versions 0.97, January 1998, through 1.2.2beta1 - February 22, 2002: Glenn
  *  See also "Contributing Authors", below.
  *
  * Note about libpng version numbers:
@@ -81,6 +81,7 @@
  *    1.2.1beta1-4             3    10201  3.1.2.1beta1-4
  *    1.2.1rc1-2               3    10201  3.1.2.1rc1-2
  *    1.2.1                    3    10201  3.1.2.1
+ *    1.2.2beta1              12    10202  12.so.0.1.2.2beta1
  *
  *    Henceforth the source version will match the shared-library major
  *    and minor numbers; the shared-library major version number will be
@@ -110,7 +111,7 @@
  * If you modify libpng you may insert additional notices immediately following
  * this sentence.
  *
- * libpng versions 1.0.7, July 1, 2000, through  1.2.1, December 12, 2001, are
+ * libpng versions 1.0.7, July 1, 2000, through  1.2.2beta1, February 22, 2002, are
  * Copyright (c) 2000, 2001 Glenn Randers-Pehrson, and are
  * distributed according to the same disclaimer and license as libpng-1.0.6
  * with the following individuals added to the list of Contributing Authors
@@ -215,13 +216,13 @@
  * Y2K compliance in libpng:
  * =========================
  *
- *    December 12, 2001
+ *    February 22, 2002
  *
  *    Since the PNG Development group is an ad-hoc body, we can't make
  *    an official declaration.
  *
  *    This is your unofficial assurance that libpng from version 0.71 and
- *    upward through 1.2.1 are Y2K compliant.  It is my belief that earlier
+ *    upward through 1.2.2beta1 are Y2K compliant.  It is my belief that earlier
  *    versions were also Y2K compliant.
  *
  *    Libpng only has three year fields.  One is a 2-byte unsigned integer
@@ -277,19 +278,19 @@
  */
 
 /* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.2.1"
+#define PNG_LIBPNG_VER_STRING "1.2.2beta1"
 
-#define PNG_LIBPNG_VER_SONUM   3
+#define PNG_LIBPNG_VER_SONUM   0
 #define PNG_LIBPNG_VER_DLLNUM  %DLLNUM%
 
 /* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */
 #define PNG_LIBPNG_VER_MAJOR   1
 #define PNG_LIBPNG_VER_MINOR   2
-#define PNG_LIBPNG_VER_RELEASE 1
+#define PNG_LIBPNG_VER_RELEASE 2
 /* This should match the numeric part of the final component of
  * PNG_LIBPNG_VER_STRING, omitting any leading zero: */
 
-#define PNG_LIBPNG_VER_BUILD  0
+#define PNG_LIBPNG_VER_BUILD  1
 
 #define PNG_LIBPNG_BUILD_ALPHA    1
 #define PNG_LIBPNG_BUILD_BETA     2
@@ -297,14 +298,14 @@
 #define PNG_LIBPNG_BUILD_STABLE   4
 #define PNG_LIBPNG_BUILD_TYPEMASK 7
 #define PNG_LIBPNG_BUILD_PATCH    8 /* Can be OR'ed with STABLE only */
-#define PNG_LIBPNG_BUILD_TYPE 4
+#define PNG_LIBPNG_BUILD_TYPE 2
 
 /* Careful here.  At one time, Guy wanted to use 082, but that would be octal.
  * We must not include leading zeros.
  * Versions 0.7 through 1.0.0 were in the range 0 to 100 here (only
  * version 1.0.0 was mis-numbered 100 instead of 10000).  From
  * version 1.0.1 it's    xxyyzz, where x=major, y=minor, z=release */
-#define PNG_LIBPNG_VER 10201 /* 1.2.1 */
+#define PNG_LIBPNG_VER 10202 /* 1.2.2 */
 
 #ifndef PNG_VERSION_INFO_ONLY
 
@@ -1253,9 +1254,9 @@
 
 
 /* This prevents a compiler error in png_get_copyright() in png.c if png.c
-   and png.h are both at version 1.2.1
+   and png.h are both at version 1.2.2beta1
  */
-typedef png_structp version_1_2_1;
+typedef png_structp version_1_2_2beta1;
 
 typedef png_struct FAR * FAR * png_structpp;
 
@@ -2372,7 +2373,7 @@
 /* Maintainer: Put new public prototypes here ^, in libpng.3, and project defs */
 
 #define PNG_HEADER_VERSION_STRING \
-   " libpng version 1.2.1 - December 12, 2001 (header)\n"
+   " libpng version 1.2.2beta1 - February 22, 2002 (header)\n"
 
 #ifdef PNG_READ_COMPOSITE_NODIV_SUPPORTED
 /* With these routines we avoid an integer divide, which will be slower on
@@ -2497,6 +2498,7 @@
 #define PNG_FLAG_LIBRARY_MISMATCH         0x20000L
 #define PNG_FLAG_STRIP_ERROR_NUMBERS      0x40000L
 #define PNG_FLAG_STRIP_ERROR_TEXT         0x80000L
+#define PNG_FLAG_MALLOC_NULL_MEM_OK       0x100000L
 
 /* For use in png_set_keep_unknown, png_handle_as_unknown */
 #define HANDLE_CHUNK_AS_DEFAULT   0