Fixed file loss when power off inconshreveable#44

Author: doitdistributed

apply.go

@@ -118,7 +118,8 @@ func Apply(update io.Reader, opts Options) error {
 	if err != nil {
 		return err
 	}
-
+	//don't call fp.Sync(). system power off ,file will lost
+	fp.Sync()
 	// if we don't call fp.Close(), windows won't let us move the new executable
 	// because the file will still be "in use"
 	fp.Close()