dova: Fix default values for boolean and numeric types
dova: Fix default values for boolean and numeric types

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