Fix get_parent_range to return 0 when there is no parent
Fix get_parent_range to return 0 when there is no parent

Fixes #15635

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