GObject: Check arguments of Object constructor chain up
GObject: Check arguments of Object constructor chain up

kamanashisroy/aroop,flobrosch/vala-fixes,Jc2k/vala,frida/vala,tjol/vala-tjol,spidermonkdust/vala,severinh/vala,GNOME/vala,lovebug356/vala,jessevdk/vala,jessevdk/vala,Distrotech/vala,playya/vala,rvu95/vala,spidermonkdust/vala,spidermonkdust/vala,playya/vala,xdave/pvala,themiwi/vala,tjol/vala-tjol,lovebug356/vala,GNOME/vala,themiwi/vala,frida/vala,playya/vala,themiwi/vala,frida/vala,severinh/vala,kamanashisroy/aroop,flobrosch/vala-fixes,Distrotech/vala,GNOME/vala,frida/vala,phako/vala,severinh/vala,Jc2k/vala,rvu95/vala,rvu95/vala,frida/vala,kamanashisroy/aroop,jessevdk/vala,Distrotech/vala,phako/vala,flobrosch/vala-fixes,GNOME/vala,tjol/vala-tjol