Fix using wrong variable when checking in `ResourceSaver::save`
Fix using wrong variable when checking in `ResourceSaver::save`

Valentactive/godot,godotengine/godot,Zylann/godot,Zylann/godot,godotengine/godot,guilhermefelipecgs/godot,firefly2442/godot,firefly2442/godot,Shockblast/godot,BastiaanOlij/godot,ZuBsPaCe/godot,Zylann/godot,BastiaanOlij/godot,josempans/godot,guilhermefelipecgs/godot,akien-mga/godot,Zylann/godot,BastiaanOlij/godot,Valentactive/godot,josempans/godot,josempans/godot,sanikoyes/godot,vkbsb/godot,Shockblast/godot,ZuBsPaCe/godot,josempans/godot,BastiaanOlij/godot,pkowal1982/godot,guilhermefelipecgs/godot,Shockblast/godot,josempans/godot,josempans/godot,sanikoyes/godot,sanikoyes/godot,ZuBsPaCe/godot,Valentactive/godot,ZuBsPaCe/godot,sanikoyes/godot,BastiaanOlij/godot,Shockblast/godot,pkowal1982/godot,ZuBsPaCe/godot,vkbsb/godot,guilhermefelipecgs/godot,BastiaanOlij/godot,Zylann/godot,Zylann/godot,akien-mga/godot,akien-mga/godot,sanikoyes/godot,ZuBsPaCe/godot,guilhermefelipecgs/godot,pkowal1982/godot,Shockblast/godot,pkowal1982/godot,firefly2442/godot,godotengine/godot,Valentactive/godot,guilhermefelipecgs/godot,Valentactive/godot,Valentactive/godot,josempans/godot,akien-mga/godot,firefly2442/godot,akien-mga/godot,vkbsb/godot,guilhermefelipecgs/godot,Valentactive/godot,vkbsb/godot,pkowal1982/godot,guilhermefelipecgs/godot,vkbsb/godot,firefly2442/godot,BastiaanOlij/godot,ZuBsPaCe/godot,firefly2442/godot,firefly2442/godot,Shockblast/godot,vkbsb/godot,ZuBsPaCe/godot,akien-mga/godot,pkowal1982/godot,sanikoyes/godot,josempans/godot,BastiaanOlij/godot,Shockblast/godot,pkowal1982/godot,vkbsb/godot,Zylann/godot,godotengine/godot,vkbsb/godot,akien-mga/godot,godotengine/godot,pkowal1982/godot,sanikoyes/godot,akien-mga/godot,Shockblast/godot,sanikoyes/godot,Zylann/godot,godotengine/godot,firefly2442/godot,godotengine/godot,Valentactive/godot,godotengine/godot