coverity#1130487 : Unitialized scalar field

Change-Id: Iea976b917c41b7557b18298e20adf2ccd6663670
macosx: add --enable-macosx-retina

this tell the info.plist that the application is
'high resolution enabled'

Change-Id: I8e43e20f78c822d1cebab873f340143fe2dee4ea