Origin: upstream, commit:8a19c1532dd1847fd77b3b9dd9f9d9562f9baa25
Author: Marc Sabatella <marc@outsideshore.com>
Description: fix #307720: assertion failure adding image to vertical frame
 .
 Resolves: https://musescore.org/en/node/307720
 .
 we are tryng to cast an element to an HBox that isn't necessarily one.
 No reason to do this; it works just fine without the cast.

--- a/mscore/propertymenu.cpp
+++ b/mscore/propertymenu.cpp
@@ -311,7 +311,7 @@ void ScoreView::elementPropertyAction(co
                   }
             }
       else if (cmd == "picture") {
-            mscore->addImage(score(), static_cast<HBox*>(e));
+            mscore->addImage(score(), e);
             }
       else if (cmd == "frame-text") {
             Text* t = new Text(score(), Tid::FRAME);