Update ImGui

src/app/core/controller.cc

@@ -256,7 +256,7 @@ absl::Status Controller::CreateGuiContext() {
 
   // Build a new ImGui frame
   ImGui_ImplSDLRenderer2_NewFrame();
-  ImGui_ImplSDL2_NewFrame(window_.get());
+  ImGui_ImplSDL2_NewFrame();
 
   return absl::OkStatus();
 }

src/app/editor/dungeon_editor.cc

@@ -95,6 +95,7 @@ absl::Status DungeonEditor::Initialize() {
   for (int block : rooms_[current_room_id_].blocks()) {
     room_gfx_sheets_.emplace_back(graphics_bin_[block].get());
   }
+  return absl::OkStatus();
 }
 
 absl::Status DungeonEditor::RefreshGraphics() {