Allow using array element access as ref and out method arguments
Allow using array element access as ref and out method arguments

Fixes bug 609388.

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