Fix crash with dynamic property access
Fix crash with dynamic property access

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