[gvfs] gphoto2: Fix wrong format specifier in debug print

[Ondrej Holy <oholy src gnome org>]

commit 93c0b6f5f65e4bb4c81916d1d2bf70c5fd61a86a
Author: Ondrej Holy <oholy redhat com>
Date:   Tue Oct 31 17:15:37 2017 +0100

    gphoto2: Fix wrong format specifier in debug print
    
    https://bugzilla.gnome.org/show_bug.cgi?id=789491

 monitor/gphoto2/ggphoto2volumemonitor.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/monitor/gphoto2/ggphoto2volumemonitor.c b/monitor/gphoto2/ggphoto2volumemonitor.c
index 595512a..042aa9e 100644
--- a/monitor/gphoto2/ggphoto2volumemonitor.c
+++ b/monitor/gphoto2/ggphoto2volumemonitor.c
@@ -161,7 +161,7 @@ gudev_add_camera (GGPhoto2VolumeMonitor *monitor, GUdevDevice *device, gboolean
        return;
     }
 
-    g_debug ("gudev_add_camera: camera device %s (bus: %i, device: %i)",
+    g_debug ("gudev_add_camera: camera device %s (bus: %s, device: %s)",
              g_udev_device_get_device_file (device),
              usb_bus_num, usb_device_num);