Merge pull request #20 from stanley-cheung/fix-roots-pem

Fix logic setting default roots pem

Author: stanley-cheung

src/lib/BaseStub.php

@@ -43,14 +43,8 @@ class BaseStub
      */
     public function __construct($hostname, $opts, $channel = null)
     {
-        if (!method_exists('ChannelCredentials', 'isDefaultRootsPemSet')) {
-            // for backwards compatibility
-            // isDefaultRootsPemSet() may not be defined if the pecl extension
-            // is not upgraded
-            $ssl_roots = file_get_contents(
-                dirname(__FILE__).'/../../etc/roots.pem'
-            );
-        } elseif (!ChannelCredentials::isDefaultRootsPemSet()) {
+        if (!method_exists('ChannelCredentials', 'isDefaultRootsPemSet') ||
+            !ChannelCredentials::isDefaultRootsPemSet()) {
             $ssl_roots = file_get_contents(
                 dirname(__FILE__).'/../../etc/roots.pem'
             );