Bugfix: PDO shell plugin

* Fix broken .set command
* Prevent crash if database not available

plugins/com.noccy.pdo.shell/Shell/PdoShell.php

@@ -218,7 +218,7 @@ class PdoShell {
                 $this->output->writeln("<error>No such option {$varname}</>");
                 return;
             }
-            $this->options[$varname] = $args;
+            $this->options[$varname] = $value;
         } else {
             $this->output->writeln(var_export($this->options[$varname]??null,true));
         }
@@ -291,9 +291,9 @@ class PdoShell {
             $this->output->writeln("<error>No database resource selected</>");
             return;
         }
-        $pdo = $this->db->getPDO();
 
         try {
+            $pdo = $this->db->getPDO();
             $stmt = $pdo->prepare($query);
             $stmt->execute($params);
             $res = $stmt->fetchAll(\PDO::FETCH_ASSOC);