girwriter: Fix handling of delegate params
girwriter: Fix handling of delegate params

Regression of d74c5fb0654ef5985d763a7847c8013de781aac3

rvu95/vala,flobrosch/vala-fixes,Distrotech/vala,frida/vala,GNOME/vala,spidermonkdust/vala,rvu95/vala,frida/vala,frida/vala,xdave/pvala,spidermonkdust/vala,Distrotech/vala,rvu95/vala,GNOME/vala,Distrotech/vala,GNOME/vala,GNOME/vala,flobrosch/vala-fixes,frida/vala,flobrosch/vala-fixes,spidermonkdust/vala,frida/vala