Coding Standards: Use strict comparison in is_user_spammy().

Follow-up to [https://mu.trac.wordpress.org/changeset/1640 mu:1640].

Props debarghyabanerjee, aristath, poena, afercia, SergeyBiryukov.
See #62279, #62283.

git-svn-id: https://develop.svn.wordpress.org/trunk@59563 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/ms-functions.php

@@ -2304,7 +2304,7 @@ function is_user_spammy( $user = null ) {
 		}
 	}
 
-	return $user && isset( $user->spam ) && 1 == $user->spam;
+	return $user && isset( $user->spam ) && '1' === $user->spam;
 }
 
 /**