PNG encoder fix from plasqdev
PNG encoder fix from plasqdev

JackLian/cocotron,crystax/android-vendor-cocotron,ruppmatt/cocotron,Suninus/cocotron,cneira/cocotron,yuhangwang/cocotron,crystax/android-vendor-cocotron,JackLian/cocotron,cneira/cocotron,guestOS/guestOS,ruppmatt/cocotron,plasq/cocotron,cneira/cocotron,cjwl/cocotron,yuhangwang/cocotron,cyclaero/cocotron,crystax/android-vendor-cocotron,Suninus/cocotron,cyclaero/cocotron,plasq/cocotron,gemu2015/cocotron-sierra,ruppmatt/cocotron,gemu2015/cocotron-sierra,Suninus/cocotron,cneira/cocotron,cjwl/cocotron,cyclaero/cocotron,cjwl/cocotron,Suninus/cocotron,guestOS/guestOS,JackLian/cocotron,gemu2015/cocotron-sierra,plasq/cocotron,yuhangwang/cocotron,gemu2015/cocotron-sierra,yuhangwang/cocotron,cjwl/cocotron,guestOS/guestOS,ruppmatt/cocotron,cyclaero/cocotron,guestOS/guestOS,JackLian/cocotron,crystax/android-vendor-cocotron,plasq/cocotron