fixes progressive (interlacing) png's. rev:pnunn@netscape.com, a:brendan@mozilla.org git-svn-id: svn://10.0.0.236/trunk@70757 18797224-902f-48f8-a5cc-f745e15eee43
fixes progressive (interlacing) png's. rev:pnunn@netscape.com, a:brendan@mozilla.org git-svn-id: svn://10.0.0.236/trunk@70757 18797224-902f-48f8-a5cc-f745e15eee43