Fix passing delegate field without target as method argument
Fix passing delegate field without target as method argument

Fixes bug 592769.

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