girparser: Fix some source reference when reporting errors after parsing
girparser: Fix some source reference when reporting errors after parsing

rvu95/vala,flobrosch/vala-fixes,frida/vala,frida/vala,frida/vala,rvu95/vala,GNOME/vala,spidermonkdust/vala,GNOME/vala,flobrosch/vala-fixes,frida/vala,spidermonkdust/vala,spidermonkdust/vala,frida/vala,GNOME/vala,flobrosch/vala-fixes,rvu95/vala,GNOME/vala