Fix PHP 8.1 fatal error with --orderby=size and --size_format=mb (#230)

Author: danielbachhuber

features/db-size.feature

@@ -237,3 +237,12 @@ Feature: Display database size
       """
       [{"Name":"wp_posts",
       """
+
+  Scenario: Display ordered table sizes for a WordPress install
+    Given a WP install
+
+    When I run `wp db size --tables --all-tables --orderby=size --order=desc --size_format=mb`
+    Then STDOUT should contain:
+      """
+      wp_posts
+      """

src/DB_Command.php

@@ -1102,7 +1102,7 @@ public function size( $args, $assoc_args ) {
 					$size_format_display = preg_replace( '/IB$/u', 'iB', strtoupper( $size_format ) );
 
 					$decimals               = Utils\get_flag_value( $assoc_args, 'decimals', 0 );
-					$rows[ $index ]['Size'] = round( $row['Size'] / $divisor, $decimals ) . ' ' . $size_format_display;
+					$rows[ $index ]['Size'] = round( (int) $row['Bytes'] / $divisor, $decimals ) . ' ' . $size_format_display;
 			}
 		}