x11: Set array_length to false for ModifierKeymap.modifiermap
x11: Set array_length to false for ModifierKeymap.modifiermap

Fixes bug 666099.

tjol/vala-tjol,jessevdk/vala,frida/vala,severinh/vala,severinh/vala,xdave/pvala,frida/vala,flobrosch/vala-fixes,tjol/vala-tjol,playya/vala,tjol/vala-tjol,spidermonkdust/vala,rvu95/vala,flobrosch/vala-fixes,rvu95/vala,jessevdk/vala,Distrotech/vala,frida/vala,flobrosch/vala-fixes,GNOME/vala,severinh/vala,GNOME/vala,spidermonkdust/vala,jessevdk/vala,spidermonkdust/vala,playya/vala,Distrotech/vala,frida/vala,GNOME/vala,playya/vala,frida/vala,GNOME/vala,rvu95/vala,Distrotech/vala