update imgui

src/gooey.h

@@ -18,6 +18,7 @@ void renderGooey(SDL_Handles &handles, HexDrawMode &mode);
 bool
 initGooey(SDL_Handles &handles, v2i vp_dims /*TODO: pass in game state*/)
 {
+	IMGUI_CHECKVERSION();
 	ImGui::CreateContext();
 	ImGuiIO& io = ImGui::GetIO(); (void)io;
 	ImGui_ImplSdlGL3_Init(handles.window);
@@ -32,6 +33,7 @@ void
 shutdownGooey()
 {
 	ImGui_ImplSdlGL3_Shutdown();
+	ImGui::DestroyContext();
 }
 
 bool
@@ -75,6 +77,7 @@ renderGooey(SDL_Handles &handles, HexDrawMode &mode, bool &is_debug)
 	ImGui::SameLine(); ImGui::TextUnformatted(is_debug ? "true" : "false");
 
 	ImGui::Render();
+	ImGui_ImplSdlGL3_RenderDrawData(ImGui::GetDrawData());
 }
 
 #endif // GOOEY_H