Fix crash in RotateScreen when there are no subscreens.

diff --git a/bigscreen/rotatescreen.cpp b/bigscreen/rotatescreen.cpp
index 871a6555f93550f52240cbe1a9a22a35c1e92ef2..c2285ae787d3beb2dc85d480ed15df37e931eb7c 100644 (file)
--- a/bigscreen/rotatescreen.cpp
+++ b/bigscreen/rotatescreen.cpp
@@ -184,7 +184,7 @@ bool RotateScreen::can_update()
 
        if (since < 3.0)
                return false;
-       if (fade_to_new_info && !subscreens[current_screen].screen->check_invalidated() && since < 8.0)
+       if (fade_to_new_info && subscreens.size() > 0 && !subscreens[current_screen].screen->check_invalidated() && since < 8.0)
                return false;
        return true;
 }