Suppress libpng warnings from appearing on stdout.
Suppress libpng warnings from appearing on stdout.

renzodenardi/Pangolin,tschmidt23/Pangolin,mp3guy/Pangolin,mp3guy/Pangolin,wxdzju/Pangolin,pinglin/Pangolin,arpg/Pangolin,tschmidt23/Pangolin,renzodenardi/Pangolin,stevenlovegrove/Pangolin,tschmidt23/Pangolin,janjachnik/Pangolin,randi120/Pangolin,wxdzju/Pangolin,stevenlovegrove/Pangolin,pinglin/Pangolin,mp3guy/Pangolin,visigoth/Pangolin,randi120/Pangolin,visigoth/Pangolin,janjachnik/Pangolin,arpg/Pangolin,stevenlovegrove/Pangolin