- fixed return value to be bool for execute() (did not run test suite)

lib/Doctrine/Connection/Statement.php

@@ -217,21 +217,22 @@ class Doctrine_Connection_Statement implements Doctrine_Adapter_Statement_Interf
             $event = new Doctrine_Event($this, Doctrine_Event::STMT_EXECUTE, $this->getQuery(), $params);
             $this->_conn->getListener()->preStmtExecute($event);
 
+            $result = true;
             if ( ! $event->skipOperation) {
-                $this->_stmt->execute($params);
+                $result = $this->_stmt->execute($params);
                 $this->_conn->incrementQueryCount();
             }
 
             $this->_conn->getListener()->postStmtExecute($event);
 
-            return $this;
+            return $result;
         } catch (PDOException $e) {
         } catch (Doctrine_Adapter_Exception $e) {
         }
 
         $this->_conn->rethrowException($e, $this);
 
-        return $this;
+        return false;
     }
     /**
      * fetch