MGASA-2015-0101 Updated pngcrush package fixes security vulnerability

pngcrush-1.7.84 fixes defects reported by Coverity-scan, so it should be more resistant to crashes due to malformed input files, such as the one presented in CVE-2015-2158...

Updated pngcrush package fixes security vulnerability

pngcrush-1.7.84 fixes defects reported by Coverity-scan, so it should be more resistant to crashes due to malformed input files, such as the one presented in CVE-2015-2158...