Fix uninitialized `GridMapEditor::node` and `InputMapEditor::setting` variables.

editor/input_map_editor.h

@@ -69,7 +69,7 @@ class InputMapEditor : public Control {
 	AcceptDialog *message;
 	UndoRedo *undo_redo;
 	String inputmap_changed;
-	bool setting;
+	bool setting = false;
 
 	void _update_actions();
 	void _add_item(int p_item, Ref<InputEvent> p_exiting_event = Ref<InputEvent>());

modules/gridmap/grid_map_editor_plugin.h

@@ -93,7 +93,7 @@ class GridMapEditor : public VBoxContainer {
 
 	List<SetItem> set_items;
 
-	GridMap *node;
+	GridMap *node = nullptr;
 	MeshLibrary *last_mesh_library;
 	ClipMode clip_mode;