Fix a bug in linux mouse handling which prevented middle/right button being detected
Fix a bug in linux mouse handling which prevented middle/right button being detected

mikymod/crown,galek/crown,taylor001/crown,taylor001/crown,mikymod/crown,galek/crown,mikymod/crown,galek/crown,mikymod/crown,dbartolini/crown,dbartolini/crown,galek/crown,taylor001/crown,dbartolini/crown,dbartolini/crown,taylor001/crown