[presentation] Fix a crash when starting animation

Fixes bug #619948.

diff --git a/libview/ev-view-presentation.c b/libview/ev-view-presentation.c
index baa6bed353132025216a73b678641de7b1e65f26..b1819ef8e04fbb43d7e933452ae1aeb19cad51b4 100644 (file)
--- a/libview/ev-view-presentation.c
+++ b/libview/ev-view-presentation.c
@@ -295,16 +295,16 @@ ev_view_presentation_animation_start (EvViewPresentation *pview,
 
        pview->animation = ev_transition_animation_new (effect);
 
-       surface = EV_JOB_RENDER (pview->curr_job)->surface;
+       surface = pview->curr_job ? EV_JOB_RENDER (pview->curr_job)->surface : NULL;
        ev_transition_animation_set_origin_surface (pview->animation,
                                                    surface != NULL ?
                                                    surface : pview->current_surface);
 
        jump = new_page - pview->current_page;
        if (jump == -1)
-               surface = EV_JOB_RENDER (pview->prev_job)->surface;
+               surface = pview->prev_job ? EV_JOB_RENDER (pview->prev_job)->surface : NULL;
        else if (jump == 1)
-               surface = EV_JOB_RENDER (pview->next_job)->surface;
+               surface = pview->next_job ? EV_JOB_RENDER (pview->next_job)->surface : NULL;
        else
                surface = NULL;
        if (surface)