libpng-1.6.23 is available

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libpng-1.6.23 is available from
ftp://ftp.simplesystems.org/pub/png/src/libpng16/
and from
http://libpng.sf.net

  Stop a potential memory leak in png_set_tRNS() (Bug report by Ted Ying).
  Fixed the progressive reader to handle empty first IDAT chunk properly
    (patch by Timothy Nikkel).  This bug was introduced in libpng-1.6.0 and
    only affected the libpng16 branch.
  Added tests in pngvalid.c to check zero-length IDAT chunks in various
    positions.  Fixed the sequential reader to handle these more robustly
    (John Bowler).
  Corrected progressive read input buffer in pngvalid.c. The previous
version
    the code invariably passed just one byte at a time to libpng.  The
intent
    was to pass a random number of bytes in the range 0..511.
  Moved sse2 prototype from pngpriv.h to contrib/intel/intel_sse.patch.
  Added missing ")" in pngerror.c (Matt Sarrett).
  Fixed undefined behavior in png_push_save_buffer(). Do not call
    memcpy() with a null source, even if count is zero (Leon Scroggins III).
  Fixed bad link to RFC2083 in png.5 (Nikola Forro).

Glenn

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<div dir=3D"ltr"><div><div><div>libpng-1.6.23 is available from<br></div><a=
 href=3D"ftp://ftp.simplesystems.org/pub/png/src/libpng16/">ftp://ftp.simpl=
esystems.org/pub/png/src/libpng16/</a><br></div>and from<br></div><a href=
=3D"http://libpng.sf.net">http://libpng.sf.net</a>=C2=A0 <br><div><div><div=
><div><br>=C2=A0 Stop a potential memory leak in png_set_tRNS() (Bug report=
 by Ted Ying).<br>=C2=A0 Fixed the progressive reader to handle empty first=
 IDAT chunk properly<br>=C2=A0=C2=A0=C2=A0 (patch by Timothy Nikkel).=C2=A0=
 This bug was introduced in libpng-1.6.0 and<br>=C2=A0=C2=A0=C2=A0 only aff=
ected the libpng16 branch.<br>=C2=A0 Added tests in pngvalid.c to check zer=
o-length IDAT chunks in various<br>=C2=A0=C2=A0=C2=A0 positions.=C2=A0 Fixe=
d the sequential reader to handle these more robustly<br>=C2=A0=C2=A0=C2=A0=
 (John Bowler).<br>=C2=A0 Corrected progressive read input buffer in pngval=
id.c. The previous version<br>=C2=A0=C2=A0=C2=A0 the code invariably passed=
 just one byte at a time to libpng.=C2=A0 The intent<br>=C2=A0=C2=A0=C2=A0 =
was to pass a random number of bytes in the range 0..511.<br>=C2=A0 Moved s=
se2 prototype from pngpriv.h to contrib/intel/intel_sse.patch.<br>=C2=A0 Ad=
ded missing &quot;)&quot; in pngerror.c (Matt Sarrett).<br>=C2=A0 Fixed und=
efined behavior in png_push_save_buffer(). Do not call<br>=C2=A0=C2=A0=C2=
=A0 memcpy() with a null source, even if count is zero (Leon Scroggins III)=
.<br>=C2=A0 Fixed bad link to RFC2083 in png.5 (Nikola Forro).<br><br></div=
><div>Glenn<br></div></div></div></div></div>

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