Comments: look for wp_error when checking whether `$wpdb->get_col_length()` has failed.

See #10377.
Built from https://develop.svn.wordpress.org/trunk@36542


git-svn-id: http://core.svn.wordpress.org/trunk@36509 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/comment.php

@@ -972,7 +972,7 @@ function wp_get_comment_fields_max_lengths() {
 			$max_length = 0;
 
 			// No point if we can't get the DB column lengths
-			if ( $col_length === false ) {
+			if ( is_wp_error( $col_length ) ) {
 				break;
 			}
 

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.5-alpha-36541';
+$wp_version = '4.5-alpha-36542';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.