Guarantee start & end points are returned by Navigation2D
Guarantee start & end points are returned by Navigation2D

So start and end points are unconditionally added to the returned point list, but first and last middle points are checked against them to avoid duplicates.

`CMP_EPSILON` was already providing a guarantee, but knowing you will get exactly the endpoints you provided is even better.

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