HTTP API: Declare a few default parameters in WP_Http_Curl and WP_Http_Streams.

This resolves `Undefined array key` PHP warnings when trying to access any of these values in `WP_Http_Curl::request()` or `WP_Http_Streams::request()`:

* `$parsed_args['decompress']`
* `$parsed_args['stream']`
* `$parsed_args['filename']`

Follow-up to [10410], [11236], [13274], [17555], [37428], [42766], [44346].

Props sjoerdlinders, hellofromTonya, jrf, oglekler, Clorith, SergeyBiryukov.
Fixes #52622.

git-svn-id: https://develop.svn.wordpress.org/trunk@56128 602fd350-edb4-49c9-b593-d223f7449a82

Author: SergeyBiryukov

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

@@ -78,6 +78,9 @@ public function request( $url, $args = array() ) {
 			'headers'     => array(),
 			'body'        => null,
 			'cookies'     => array(),
+			'decompress'  => false,
+			'stream'      => false,
+			'filename'    => null,
 		);
 
 		$parsed_args = wp_parse_args( $args, $defaults );

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

@@ -37,6 +37,9 @@ public function request( $url, $args = array() ) {
 			'headers'     => array(),
 			'body'        => null,
 			'cookies'     => array(),
+			'decompress'  => false,
+			'stream'      => false,
+			'filename'    => null,
 		);
 
 		$parsed_args = wp_parse_args( $args, $defaults );