rdp: Fixed codec initialisations

This patch fixes NSC codec initialisation that was not done (an
erronous copy'n paste).
The remoteFx context must be resetted when we go through an activation
sequence

src/compositor-rdp.c

@@ -555,7 +555,7 @@ rdp_peer_context_new(freerdp_peer* client, RdpPeerContext* context)
 	rfx_context_set_pixel_format(context->rfx_context, RDP_PIXEL_FORMAT_B8G8R8A8);
 
 	context->nsc_context = nsc_context_new();
-	rfx_context_set_pixel_format(context->rfx_context, RDP_PIXEL_FORMAT_B8G8R8A8);
+	nsc_context_set_pixel_format(context->nsc_context, RDP_PIXEL_FORMAT_B8G8R8A8);
 
 	context->encode_stream = Stream_New(NULL, 65536);
 }
@@ -703,6 +703,8 @@ xf_peer_post_connect(freerdp_peer* client)
 static BOOL
 xf_peer_activate(freerdp_peer *client)
 {
+	RdpPeerContext *context = (RdpPeerContext *)client->context;
+	rfx_context_reset(context->rfx_context);
 	return TRUE;
 }