I18N: In wp_maybe_decline_date(), bail early if translation functions are not available, e.g. in SHORTINIT mode.

Merges [35880] to the 4.4 branch.
Props SergeyBiryukov.
Fixes #34967.


git-svn-id: https://develop.svn.wordpress.org/branches/4.4@36063 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/functions.php

@@ -172,6 +172,11 @@ function date_i18n( $dateformatstring, $unixtimestamp = false, $gmt = false ) {
 function wp_maybe_decline_date( $date ) {
 	global $wp_locale;
 
+	// i18n functions are not available in SHORTINIT mode
+	if ( ! function_exists( '_x' ) ) {
+		return $date;
+	}
+
 	/* translators: If months in your language require a genitive case,
 	 * translate this to 'on'. Do not translate into your own language.
 	 */