Fix Object::get_indexed for simple properties.
Fix Object::get_indexed for simple properties.

Object::get_indexed was not correctly reporting invalid keys if the name
was a direct property (not a subproperty), causing for example Tween to
not report correctly a bad interpolate_property key.

vkbsb/godot,josempans/godot,Shockblast/godot,DmitriySalnikov/godot,MarianoGnu/godot,Shockblast/godot,josempans/godot,firefly2442/godot,MarianoGnu/godot,Paulloz/godot,guilhermefelipecgs/godot,firefly2442/godot,Zylann/godot,BastiaanOlij/godot,ZuBsPaCe/godot,Valentactive/godot,josempans/godot,Valentactive/godot,ex/godot,BastiaanOlij/godot,Zylann/godot,ZuBsPaCe/godot,Zylann/godot,Paulloz/godot,DmitriySalnikov/godot,ex/godot,firefly2442/godot,vnen/godot,akien-mga/godot,vkbsb/godot,akien-mga/godot,Valentactive/godot,DmitriySalnikov/godot,BastiaanOlij/godot,DmitriySalnikov/godot,firefly2442/godot,BastiaanOlij/godot,pkowal1982/godot,honix/godot,sanikoyes/godot,sanikoyes/godot,honix/godot,josempans/godot,ZuBsPaCe/godot,Faless/godot,vkbsb/godot,vnen/godot,ex/godot,godotengine/godot,DmitriySalnikov/godot,akien-mga/godot,ZuBsPaCe/godot,Zylann/godot,vnen/godot,honix/godot,Faless/godot,Zylann/godot,Faless/godot,Zylann/godot,guilhermefelipecgs/godot,ZuBsPaCe/godot,godotengine/godot,firefly2442/godot,vkbsb/godot,BastiaanOlij/godot,akien-mga/godot,firefly2442/godot,Faless/godot,pkowal1982/godot,akien-mga/godot,pkowal1982/godot,Paulloz/godot,sanikoyes/godot,pkowal1982/godot,pkowal1982/godot,vkbsb/godot,vnen/godot,Valentactive/godot,Faless/godot,ex/godot,MarianoGnu/godot,Zylann/godot,sanikoyes/godot,MarianoGnu/godot,Paulloz/godot,godotengine/godot,godotengine/godot,Valentactive/godot,josempans/godot,firefly2442/godot,ZuBsPaCe/godot,pkowal1982/godot,josempans/godot,guilhermefelipecgs/godot,BastiaanOlij/godot,josempans/godot,ex/godot,akien-mga/godot,vkbsb/godot,guilhermefelipecgs/godot,ex/godot,firefly2442/godot,MarianoGnu/godot,MarianoGnu/godot,MarianoGnu/godot,sanikoyes/godot,ex/godot,MarianoGnu/godot,vnen/godot,guilhermefelipecgs/godot,BastiaanOlij/godot,Faless/godot,vnen/godot,vkbsb/godot,pkowal1982/godot,BastiaanOlij/godot,ZuBsPaCe/godot,sanikoyes/godot,vnen/godot,akien-mga/godot,Shockblast/godot,Paulloz/godot,ex/godot,Paulloz/godot,honix/godot,Faless/godot,DmitriySalnikov/godot,Valentactive/godot,Valentactive/godot,Shockblast/godot,sanikoyes/godot,guilhermefelipecgs/godot,DmitriySalnikov/godot,godotengine/godot,guilhermefelipecgs/godot,Zylann/godot,akien-mga/godot,Faless/godot,Shockblast/godot,Paulloz/godot,honix/godot,vkbsb/godot,Valentactive/godot,godotengine/godot,sanikoyes/godot,Shockblast/godot,pkowal1982/godot,godotengine/godot,Shockblast/godot,godotengine/godot,vnen/godot,guilhermefelipecgs/godot,josempans/godot,Shockblast/godot,honix/godot,ZuBsPaCe/godot