codewriter: Write cheader_filename for methods not in a Namespace
codewriter: Write cheader_filename for methods not in a Namespace

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