GltfLoader: fix too generic assigment of light decay

Author: Samuel Rigaud

examples/jsm/loaders/GLTFLoader.js

@@ -576,11 +576,13 @@ class GLTFLightsExtension {
 			case 'point':
 				lightNode = new PointLight( color );
 				lightNode.distance = range;
+				lightNode.decay = 2;
 				break;
 
 			case 'spot':
 				lightNode = new SpotLight( color );
 				lightNode.distance = range;
+				lightNode.decay = 2;
 				// Handle spotlight properties.
 				lightDef.spot = lightDef.spot || {};
 				lightDef.spot.innerConeAngle = lightDef.spot.innerConeAngle !== undefined ? lightDef.spot.innerConeAngle : 0;
@@ -600,8 +602,6 @@ class GLTFLightsExtension {
 		// here, because node-level parsing will only override position if explicitly specified.
 		lightNode.position.set( 0, 0, 0 );
 
-		lightNode.decay = 2;
-
 		assignExtrasToUserData( lightNode, lightDef );
 
 		if ( lightDef.intensity !== undefined ) lightNode.intensity = lightDef.intensity;