sanity_check: do not invoke PDO without checking that it exists

diff --git a/include/sanity_check.php b/include/sanity_check.php
index fc9c49a429952b0dc0ab546c937e40576971500c..dddc557f2500986ab5f206556534bad615fd34fd 100755 (executable)
--- a/include/sanity_check.php
+++ b/include/sanity_check.php
@@ -90,7 +90,7 @@
                                }
                        }
 
-                       if (SINGLE_USER_MODE) {
+                       if (SINGLE_USER_MODE && class_exists("PDO")) {
                            $pdo = DB::pdo();
 
                                $res = $pdo->query("SELECT id FROM ttrss_users WHERE id = 1");