fix: storyboard add_new_entry() might return None, handle it with ass…

…uring that it never really happens

src/modules/sbstudio/plugin/model/storyboard.py

@@ -352,7 +352,7 @@ def add_new_entry(
         formation: Optional[Collection] = None,
         select: bool = False,
         context: Optional[Context] = None,
-    ) -> StoryboardEntry:
+    ) -> Optional[StoryboardEntry]:
         """Appends a new entry to the end of the storyboard.
 
         Parameters:
@@ -365,6 +365,9 @@ def add_new_entry(
                 default
             formation: the formation that the newly added entry should refer to
             select: whether to select the newly added entry after it was created
+
+        Returns:
+            the new entry created or None if it cannot be found after creation
         """
         if name is None:
             if formation is None:

src/modules/sbstudio/plugin/operators/append_formation_to_storyboard.py

@@ -53,6 +53,7 @@ def execute_on_formation(self, formation, context):
         entry = storyboard.add_new_entry(
             name=formation.name, select=True, formation=formation
         )
+        assert entry is not None
 
         fps = context.scene.render.fps
 

src/modules/sbstudio/plugin/operators/land.py

@@ -151,6 +151,7 @@ def _run(self, storyboard, *, context) -> bool:
             select=True,
             context=context,
         )
+        assert entry is not None
         entry.transition_type = "MANUAL"
 
         # Set up the custom departure delays for the drones

src/modules/sbstudio/plugin/operators/takeoff.py

@@ -152,6 +152,7 @@ def _run(self, storyboard: Storyboard, *, context) -> bool:
             select=True,
             context=context,
         )
+        assert entry is not None
         entry.transition_type = "MANUAL"
 
         # Set up the custom departure delays for the drones