Allow implicit conversion from pointer to GValue
Allow implicit conversion from pointer to GValue

Fixes bug 654143.

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