[devel] Add png_check_IHDR() to documentation synopses

also png_check_cHRM_fixed() which was apparently overlooked when it
was created.

libpng-1.4.0beta82.txt

 libpng.txt - A description on how to use and modify libpng
 
- libpng version 1.4.0beta82 - September 23, 2009
+ libpng version 1.4.0beta82 - September 25, 2009
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2009 Glenn Randers-Pehrson
@@ -11,7 +11,7 @@ libpng.txt - A description on how to use and modify libpng
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.4.0beta82 - September 23, 2009
+ libpng versions 0.97, January 1998, through 1.4.0beta82 - September 25, 2009
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2009 Glenn Randers-Pehrson
 
@@ -3195,7 +3195,7 @@ source.
 
 XIII. Y2K Compliance in libpng
 
-September 23, 2009
+September 25, 2009
 
 Since the PNG Development group is an ad-hoc body, we can't make
 an official declaration.

libpng.3

-.TH LIBPNG 3 "September 23, 2009"
+.TH LIBPNG 3 "September 25, 2009"
 .SH NAME
 libpng \- Portable Network Graphics (PNG) Reference Library 1.4.0beta82
 .SH SYNOPSIS
@@ -809,7 +809,7 @@ Following is a copy of the libpng.txt file that accompanies libpng.
 .SH LIBPNG.TXT
 libpng.txt - A description on how to use and modify libpng
 
- libpng version 1.4.0beta82 - September 23, 2009
+ libpng version 1.4.0beta82 - September 25, 2009
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2009 Glenn Randers-Pehrson
@@ -820,7 +820,7 @@ libpng.txt - A description on how to use and modify libpng
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.4.0beta82 - September 23, 2009
+ libpng versions 0.97, January 1998, through 1.4.0beta82 - September 25, 2009
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2009 Glenn Randers-Pehrson
 
@@ -4004,7 +4004,7 @@ source.
 
 .SH XIII. Y2K Compliance in libpng
 
-September 23, 2009
+September 25, 2009
 
 Since the PNG Development group is an ad-hoc body, we can't make
 an official declaration.
@@ -4234,7 +4234,7 @@ possible without all of you.
 
 Thanks to Frank J. T. Wojcik for helping with the documentation.
 
-Libpng version 1.4.0beta82 - September 23, 2009:
+Libpng version 1.4.0beta82 - September 25, 2009:
 Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
 Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
 
@@ -4257,7 +4257,7 @@ this sentence.
 
 This code is released under the libpng license.
 
-libpng versions 1.2.6, August 15, 2004, through 1.4.0beta82, September 23, 2009, are
+libpng versions 1.2.6, August 15, 2004, through 1.4.0beta82, September 25, 2009, are
 Copyright (c) 2004,2006-2007 Glenn Randers-Pehrson, and are
 distributed according to the same disclaimer and license as libpng-1.2.5
 with the following individual added to the list of Contributing Authors
@@ -4356,7 +4356,7 @@ certification mark of the Open Source Initiative.
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-September 23, 2009
+September 25, 2009
 
 .\" end of man page
 

libpngpf.3

-.TH LIBPNGPF 3 "September 23, 2009"
+.TH LIBPNGPF 3 "September 25, 2009"
 .SH NAME
 libpng \- Portable Network Graphics (PNG) Reference Library 1.4.0beta82
 (private functions)
@@ -29,6 +29,8 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.4.0beta82
 
 \fI\fB
 
+\fBint png_check_cHRM_fixed (png_structp \fP\fIpng_ptr\fP\fB, png_fixed_point \fP\fIint_white_x\fP\fB, png_fixed_point \fP\fIint_white_y\fP\fB, png_fixed_point \fP\fIint_red_x\fP\fB, png_fixed_point \fP\fIint_red_y\fP\fB, png_fixed_point \fP\fIint_green_x\fP\fB, png_fixed_point \fP\fIint_green_y\fP\fB, png_fixed_point \fP\fIint_blue_x\fP\fB, png_fixed_point \fIint_blue_y\fP\fB);\fP
+
 \fI\fB
 
 \fBvoid png_check_chunk_name (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fIchunk_name\fP\fB);\fP
@@ -43,6 +45,12 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.4.0beta82
 
 \fI\fB
 
+\fBvoid png_check_IHDR (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fP\fIwidth\fP\fB, png_uint_32 \fP\fIheight\fP\fB, int \fP\fIbit_depth\fP\fB, int \fP\fIcolor_type\fP\fB, int \fP\fIinterlace_type\fP\fB, int \fP\fIcompression_type\fP\fB, int \fIfilter_type\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
 \fBvoid png_combine_row (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIrow\fP\fB, int \fImask\fP\fB);\fP
 
 \fI\fB