libpng-12.58rc01, 1.4.21rc01, 1.5.29rc01, 1.6.32rc01, and 1.7.0beta89 are available

libpng-1..2.58rc01, 1.4.21rc01, 1.5.29rc01, 1.6.32rc01, and 1.70beta89
are available from
https://ftp-osl.osuosl.org/pub/libpng/src/beta/
ftp://ftp-osl.osuosl.org/pub/libpng/src/beta/
http://libpng.download/src/beta/
and from
http://libpng.sf.net

version 1.2.58rc01 [August 19, 2017]
  Check for 0 return from png_get_rowbytes() and added some (size_t) typecasts
    in contrib/pngminus/*.c to stop some Coverity issues (162705, 162706,
    and 162707).

version 1.4.21rc01 [August 19, 2017]
  Check for 0 return from png_get_rowbytes() and added some (size_t) typecasts
    in contrib/pngminus/*.c to stop some Coverity issues (162705, 162706,
    and 162707).

version 1.5.29rc01 [August 19, 2017]
  Check for 0 return from png_get_rowbytes() in contrib/pngminus/*.c to stop
    some Coverity issues (162705, 162706, and 162707).

Version 1.6.32rc01 [August 18, 2017]
  Added a set of "huge_xxxx_chunk.png" files to contrib/testpngs/crashers,
    one for each known chunk type, with length = 2GB-1.
  Check for 0 return from png_get_rowbytes() and added some (size_t) typecasts
    in contrib/pngminus/*.c to stop some Coverity issues (162705, 162706,
    and 162707).
  Renamed chunks in contrib/testpngs/crashers to avoid having files whose
    names differ only in case; this causes problems with some platforms
    (github issue #172).

Version 1.7.0beta89 [August 19, 2017]
  Check for 0 return from png_get_rowbytes() in contrib/pngminus/*.c to stop
    some Coverity issues (162705, 162706, and 162707).

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