woocommerce_stock_amount rather than intval

Using woocommerce_stock_amount filter rather than intval cast

includes/abstracts/abstract-wc-product.php

@@ -163,7 +163,7 @@ class WC_Product {
 		if ( $this->managing_stock() ) {
 
 			// Update stock amount
-			$this->stock = intval( $amount );
+			$this->stock = apply_filters( 'woocommerce_stock_amount', $amount );
 
 			// Update meta
 			update_post_meta( $this->id, '_stock', $this->stock );