make addCall accessible again. fixes #2887

It also reintroduces _addCall() as a deprecated alias.

inc/parser/handler.php

@@ -44,11 +44,17 @@ public function __construct() {
      * @param mixed $args arguments for this call
      * @param int $pos  byte position in the original source file
      */
-    protected function addCall($handler, $args, $pos) {
+    public function addCall($handler, $args, $pos) {
         $call = array($handler,$args, $pos);
         $this->callWriter->writeCall($call);
     }
 
+    /** @deprecated 2019-10-31 use addCall() instead */
+    public function _addCall($handler, $args, $pos) {
+        dbg_deprecated('addCall');
+        $this->addCall($handler, $args, $pos);
+    }
+
     /**
      * Similar to addCall, but adds a plugin call
      *