[pitivi] medialibrary: Handle only the removal of UriClipAssets

[Alexandru Băluț <alexbalut src gnome org>]

commit 4c964325336cd8442e1b155b4e46e512269d2a02
Author: Alexandru Băluț <alexandru balut gmail com>
Date:   Tue Oct 11 13:45:42 2016 +0200

    medialibrary: Handle only the removal of UriClipAssets
    
    As far as the media library is concerned, the other types of assets can
    now all be removed.
    
    Reviewed-by: Thibault Saunier <tsaunier gnome org>
    Differential Revision: https://phabricator.freedesktop.org/D1378

 pitivi/medialibrary.py |    9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)
---
diff --git a/pitivi/medialibrary.py b/pitivi/medialibrary.py
index fa0865e..8972261 100644
--- a/pitivi/medialibrary.py
+++ b/pitivi/medialibrary.py
@@ -864,10 +864,11 @@ class MediaLibraryWidget(Gtk.Box, Loggable):
             self._addAsset(asset)
 
     def _assetRemovedCb(self, unused_project, asset):
-        self.debug("%s Disconnecting %s - %s", self, asset, asset.props.id)
-        asset.disconnect_by_func(self.__assetProxiedCb)
-        asset.disconnect_by_func(self.__assetProxyingCb)
-        self.__removeAsset(asset)
+        if isinstance(asset, GES.UriClipAsset):
+            self.debug("Disconnecting %s - %s", asset, asset.props.id)
+            asset.disconnect_by_func(self.__assetProxiedCb)
+            asset.disconnect_by_func(self.__assetProxyingCb)
+            self.__removeAsset(asset)
 
     def __removeAsset(self, asset):
         """Removes the specified asset."""