General: Fix code quality issues which were identified by static analysis.

This fixes minor issues that could cause PHP notices under the right conditions, and fixes some general incorrectness.

Props jrf, hellofromTonya for review

See #52217


git-svn-id: https://develop.svn.wordpress.org/trunk@51850 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/class-wp-http-streams.php

@@ -470,6 +470,6 @@ class WP_Http_Streams {
  * @since 2.7.0
  * @deprecated 3.7.0 Please use WP_HTTP::request() directly
  */
-class WP_HTTP_Fsockopen extends WP_HTTP_Streams {
+class WP_HTTP_Fsockopen extends WP_Http_Streams {
 	// For backward compatibility for users who are using the class directly.
 }