Fix declarations of struct copy and free functions
Fix declarations of struct copy and free functions

playya/vala,GNOME/vala,phako/vala,tjol/vala-tjol,frida/vala,frida/vala,severinh/vala,kamanashisroy/aroop,rvu95/vala,Jc2k/vala,themiwi/vala,flobrosch/vala-fixes,playya/vala,tjol/vala-tjol,flobrosch/vala-fixes,jessevdk/vala,frida/vala,spidermonkdust/vala,jessevdk/vala,spidermonkdust/vala,xdave/pvala,Distrotech/vala,frida/vala,spidermonkdust/vala,frida/vala,severinh/vala,severinh/vala,kamanashisroy/aroop,flobrosch/vala-fixes,tjol/vala-tjol,themiwi/vala,phako/vala,Distrotech/vala,jessevdk/vala,lovebug356/vala,lovebug356/vala,GNOME/vala,Distrotech/vala,GNOME/vala,playya/vala,GNOME/vala,rvu95/vala,rvu95/vala,Jc2k/vala,kamanashisroy/aroop,themiwi/vala