Corretti altri bug nel comportamento di play() pause() e simili,

diff --git a/RaiTV/Interface.py b/RaiTV/Interface.py
index 76c572f..abb281a 100644
--- a/RaiTV/Interface.py
+++ b/RaiTV/Interface.py
@@ -111,17 +111,16 @@ class UI():
         if self.videowidget is None:
             return

-        if not self.videowidget.playing:
-            treeselection = self.listacanali.get_selection()
-            model, treeiter = treeselection.get_selected()
-            if treeiter is None:
-                ## Questo vuol dire che non abbiamo selezionato
-                ## nulla, e quindi possiamo non fare nulla
-                return
-            mmsurl = self.channellist.getChannelFromIter(treeiter)
-            self.videowidget.load_video(mmsurl)
-        else:
-            self.videowidget.play()
+
+        treeselection = self.listacanali.get_selection()
+        model, treeiter = treeselection.get_selected()
+        if treeiter is None:
+            ## Questo vuol dire che non abbiamo selezionato
+            ## nulla, e quindi possiamo non fare nulla
+            return
+        mmsurl = self.channellist.getChannelFromIter(treeiter)
+        self.videowidget.load_video(mmsurl)
+

     def updateChannels(self):
         """Aggiorna la lista dei canali scaricandola direttamente da quella
diff --git a/RaiTV/VideoWidget.py b/RaiTV/VideoWidget.py
index 952890e..b3bbd3f 100644
--- a/RaiTV/VideoWidget.py
+++ b/RaiTV/VideoWidget.py
@@ -91,12 +91,16 @@ class GstPlayer(threading.Thread):
         self.exit_required = True

     def pause(self):
-        self.player.set_state(gst.STATE_PAUSED)
+        if self.player is not None:
+            self.player.set_state(gst.STATE_PAUSED)
+

     def play(self):
         self.player.set_state(gst.STATE_PLAYING)
         self.loading = False

+        self.playing = True
+

 class VideoWidget(gtk.DrawingArea):

@@ -170,7 +174,8 @@ class VideoWidget(gtk.DrawingArea):


     def pause(self):
-        self.player.pause()
+        if self.player is not None:
+            self.player.pause()

     def stop(self):
         self.playing = False
@@ -193,6 +198,8 @@ class VideoWidget(gtk.DrawingArea):

     def play(self):
         if self.player is not None:
+            if self.playing is True:
+                self.stop()
             self.playing = True
             self.player.play()