Fix AnimationNodeStateMachinePlayback::is_playing
Fix AnimationNodeStateMachinePlayback::is_playing

Fix #24790

BastiaanOlij/godot,guilhermefelipecgs/godot,pkowal1982/godot,pkowal1982/godot,BastiaanOlij/godot,pkowal1982/godot,vkbsb/godot,Shockblast/godot,BastiaanOlij/godot,godotengine/godot,godotengine/godot,pkowal1982/godot,godotengine/godot,josempans/godot,vkbsb/godot,pkowal1982/godot,vkbsb/godot,Shockblast/godot,guilhermefelipecgs/godot,josempans/godot,sanikoyes/godot,guilhermefelipecgs/godot,Shockblast/godot,BastiaanOlij/godot,ZuBsPaCe/godot,guilhermefelipecgs/godot,sanikoyes/godot,josempans/godot,godotengine/godot,ZuBsPaCe/godot,josempans/godot,godotengine/godot,josempans/godot,firefly2442/godot,BastiaanOlij/godot,sanikoyes/godot,josempans/godot,firefly2442/godot,Shockblast/godot,sanikoyes/godot,godotengine/godot,guilhermefelipecgs/godot,firefly2442/godot,ZuBsPaCe/godot,firefly2442/godot,Shockblast/godot,pkowal1982/godot,ZuBsPaCe/godot,vkbsb/godot,ZuBsPaCe/godot,guilhermefelipecgs/godot,Shockblast/godot,Shockblast/godot,guilhermefelipecgs/godot,vkbsb/godot,vkbsb/godot,ZuBsPaCe/godot,BastiaanOlij/godot,sanikoyes/godot,firefly2442/godot,Shockblast/godot,firefly2442/godot,josempans/godot,josempans/godot,BastiaanOlij/godot,pkowal1982/godot,sanikoyes/godot,firefly2442/godot,vkbsb/godot,pkowal1982/godot,ZuBsPaCe/godot,godotengine/godot,firefly2442/godot,sanikoyes/godot,ZuBsPaCe/godot,vkbsb/godot,godotengine/godot,guilhermefelipecgs/godot,BastiaanOlij/godot,sanikoyes/godot