Fix canvas_group not being freed in RendererCanvasCull::free
Fix canvas_group not being freed in RendererCanvasCull::free

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