Honor array_length_type when generating method parameters
Honor array_length_type when generating method parameters

Based on patch by Sam Thursfield, fixes bug 621830.

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