* unified and simplified Hydrate->fetchOne() as well as Table->find()

* both always return reliable false if result is empty

lib/Doctrine/Hydrate.php

@@ -934,12 +934,13 @@ class Doctrine_Hydrate extends Doctrine_Object implements Serializable
 
         $collection = $this->execute($params, $hydrationMode);
 
+        if (count($collection) === 0) {
+            return false;
+        }
+
         switch ($hydrationMode) {
             case Doctrine::HYDRATE_RECORD:
-                if (count($collection) > 0) {
-                    return $collection->getFirst();
-                }
-                break;
+                return $collection->getFirst();
             case Doctrine::HYDRATE_ARRAY:
                 return array_shift($collection);
         }

lib/Doctrine/Table.php

@@ -879,13 +879,9 @@ class Doctrine_Table extends Doctrine_Configurable implements Countable
 
             switch ($hydrationMode) {
                 case Doctrine::FETCH_RECORD:
-                    if (count($records) > 0) {
-                        return $records->getFirst();
-                    }
+                    return $records->getFirst();
                 case Doctrine::FETCH_ARRAY:
-                    if ( ! empty($records[0])) {
-                        return array_shift($records);
-                    }
+                    return array_shift($records);
             }
         }
         return false;