[fprint] Minor fix

[Patrick Marlier]

Hi,

This patch fixes a minor bug if there is no deactivate callback.

diff --git a/libfprint/imgdev.c b/libfprint/imgdev.c
index b365d74..14e41ae 100644
--- a/libfprint/imgdev.c
+++ b/libfprint/imgdev.c
@@ -370,7 +370,7 @@ static void dev_deactivate(struct fp_img_dev *imgdev)
         struct fp_driver *drv = imgdev->dev->drv;
         struct fp_img_driver *imgdrv = fpi_driver_to_img_driver(drv);

-       if (!imgdrv->activate)
+       if (!imgdrv->deactivate)
                 return;
         return imgdrv->deactivate(imgdev);
  }

--
Patrick Marlier.