[devel] Bump to version libpng-1.5.0beta56

libpng.3

diff --git a/libpng.3 b/libpng.3
index 88ebd5a..15371e0 100644
--- a/libpng.3
+++ b/libpng.3
@@ -1,6 +1,6 @@
 .TH LIBPNG 3 "November 21, 2010"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.5.0beta55
+libpng \- Portable Network Graphics (PNG) Reference Library 1.5.0beta56
 .SH SYNOPSIS
 \fI\fB
 
@@ -851,7 +851,7 @@
 .SH LIBPNG.TXT
 libpng-manual.txt - A description on how to use and modify libpng
 
- libpng version 1.5.0beta55 - November 21, 2010
+ libpng version 1.5.0beta56 - November 21, 2010
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2010 Glenn Randers-Pehrson
@@ -862,7 +862,7 @@
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.5.0beta55 - November 21, 2010
+ libpng versions 0.97, January 1998, through 1.5.0beta56 - November 21, 2010
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2010 Glenn Randers-Pehrson
 
@@ -1791,7 +1791,7 @@
 As of libpng version 1.2.9, png_set_expand_gray_1_2_4_to_8() was
 added.  It expands the sample depth without changing tRNS to alpha.
 
-As of libpng version 1.5.0beta55, not all possible expansions are supported.
+As of libpng version 1.5.0beta56, not all possible expansions are supported.
 
 In the following table, the 01 means grayscale with depth<8, 31 means
 indexed with depth<8, other numerals represent the color type, "T" means
@@ -4223,7 +4223,7 @@
 an official declaration.
 
 This is your unofficial assurance that libpng from version 0.71 and
-upward through 1.5.0beta55 are Y2K compliant.  It is my belief that earlier
+upward through 1.5.0beta56 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 that
@@ -4402,7 +4402,8 @@
  1.4.1               14    10401  14.so.14.1[.0]
  1.4.2               14    10402  14.so.14.2[.0]
  1.4.3               14    10403  14.so.14.3[.0]
- 1.5.0beta01-55      15    10500  15.so.15.0[.0]
+ 1.4.4               14    10404  14.so.14.4[.0]
+ 1.5.0beta01-56      15    10500  15.so.15.0[.0]
 
 Henceforth the source version will match the shared-library minor
 and patch numbers; the shared-library major version number will be
@@ -4459,7 +4460,7 @@
 
 Thanks to Frank J. T. Wojcik for helping with the documentation.
 
-Libpng version 1.5.0beta55 - November 21, 2010:
+Libpng version 1.5.0beta56 - November 21, 2010:
 Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
 Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
 
@@ -4482,7 +4483,7 @@
 
 This code is released under the libpng license.
 
-libpng versions 1.2.6, August 15, 2004, through 1.5.0beta55, November 21, 2010, are
+libpng versions 1.2.6, August 15, 2004, through 1.5.0beta56, November 21, 2010, 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