Sampler: Don't set _texture to null.

Author: Mugen87

src/renderers/common/Sampler.js

@@ -34,7 +34,8 @@ class Sampler extends Binding {
 		 */
 		this._onTextureDispose = () => {
 
-			this.texture = null;
+			this.generation = null;
+			this.version = 0;
 
 		};
 
@@ -70,7 +71,8 @@ class Sampler extends Binding {
 
 	/**
 	 * Sets the texture of this sampler.
-	 * @param {?Texture} value - The texture to set.
+	 *
+	 * @param {Texture} value - The texture to set.
 	 */
 	set texture( value ) {
 
@@ -84,9 +86,6 @@ class Sampler extends Binding {
 
 		this._texture = value;
 
-		this.generation = null;
-		this.version = 0;
-
 		if ( this._texture ) {
 
 			this._texture.addEventListener( 'dispose', this._onTextureDispose );
@@ -139,7 +138,8 @@ class Sampler extends Binding {
 
 		clonedSampler._onTextureDispose = () => {
 
-			clonedSampler.texture = null;
+			clonedSampler.generation = null;
+			clonedSampler.version = 0;
 
 		};