Check destructor names
Check destructor names

Edit: make it an error instead of warning

Fixes bug 655343.

spidermonkdust/vala,rvu95/vala,rvu95/vala,frida/vala,frida/vala,GNOME/vala,frida/vala,spidermonkdust/vala,GNOME/vala,rvu95/vala,frida/vala,GNOME/vala,frida/vala,GNOME/vala,spidermonkdust/vala