[niepce] library: fix build breakage

[Hubert Figuière <hub src gnome org>]

commit 77a8edb3d96f8455bea3d777af61ef27737c6d59
Author: Hubert Figuière <hub figuiere net>
Date:   Thu Jun 1 23:08:47 2017 -0400

    library: fix build breakage

 src/engine/library/thumbnailcache.cpp |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/engine/library/thumbnailcache.cpp b/src/engine/library/thumbnailcache.cpp
index af7f37f..9c73a96 100644
--- a/src/engine/library/thumbnailcache.cpp
+++ b/src/engine/library/thumbnailcache.cpp
@@ -99,7 +99,7 @@ void ThumbnailCache::execute(const ptr_t & task)
     if(nc) {
         // pass the notification
         fwk::Notification::Ptr n(new fwk::Notification(niepce::NOTIFICATION_THUMBNAIL));
-        ThumbnailNotification tn{task->file()->id(), pix.get_width(), get_height(), pix};
+        ThumbnailNotification tn{task->file()->id(), pix.get_width(), pix.get_height(), pix};
         n->setData(boost::any(tn));
         DBG_OUT("notify thumbnail for id=%Ld", (long long)tn.id);
         nc->post(std::move(n));