Added defensive check for wpcom taxonomies endpoint (#48070)

Author: darssen

projects/plugins/jetpack/changelog/fix-wpcom-taxonomies-endpoint-handle-wp-error

@@ -0,0 +1,4 @@
+Significance: patch
+Type: bugfix
+
+Fix taxonomies endpoint returning error when number parameter exceeds 1000.

projects/plugins/jetpack/json-endpoints/class.wpcom-json-api-get-taxonomies-endpoint.php

@@ -97,6 +97,9 @@ public function callback( $path = '', $blog_id = 0 ) {
 
 		$args = $this->query_args();
 		$args = $this->process_args( $args );
+		if ( is_wp_error( $args ) ) {
+			return $args;
+		}
 
 		if ( preg_match( '#/tags#i', $path ) ) {
 			return $this->tags( $args );