WebGPURenderer: Fix clear for default framebuffer (#30457)

* WebGPURenderer: Fix clear for default framebuffer

* cleanup

Author: RenaudRohlinger

src/renderers/common/Renderer.js

@@ -1907,12 +1907,11 @@ class Renderer {
 			renderContext.renderTarget = renderTarget;
 			renderContext.depth = renderTarget.depthBuffer;
 			renderContext.stencil = renderTarget.stencilBuffer;
+			// #30329
+			renderContext.clearColorValue = this._clearColor;
 
 		}
 
-		// #30329
-		renderContext.clearColorValue = this._clearColor;
-
 		this.backend.clear( color, depth, stencil, renderContext );
 
 		if ( renderTarget !== null && this._renderTarget === null ) {