[Stopwatch] Fix precision for root section

Author: gharlan

src/Symfony/Component/Stopwatch/Stopwatch.php

@@ -38,8 +38,8 @@ class Stopwatch
      */
     public function __construct($morePrecision = false)
     {
-        $this->reset();
         $this->morePrecision = $morePrecision;
+        $this->reset();
     }
 
     /**

src/Symfony/Component/Stopwatch/Tests/StopwatchTest.php

@@ -100,6 +100,18 @@ public function testStopWithoutStart()
         $stopwatch->stop('foo');
     }
 
+    public function testMorePrecision()
+    {
+        $stopwatch = new Stopwatch(true);
+
+        $stopwatch->start('foo');
+        $event = $stopwatch->stop('foo');
+
+        $this->assertInternalType('float', $event->getStartTime());
+        $this->assertInternalType('float', $event->getEndTime());
+        $this->assertInternalType('float', $event->getDuration());
+    }
+
     public function testSection()
     {
         $stopwatch = new Stopwatch();