Have the first geom shader working that will explode the box.

26-geometry-shaders/tests/model_tests.cpp

@@ -11,7 +11,7 @@ using namespace fuc2;
  */
 namespace model_tests {
   void test_load_textures() {
-    Shader shader{"shaders/14-vert.glsl", "shaders/14-frag.glsl"};
+    Shader shader({"shaders/14-vert.glsl", "shaders/14-frag.glsl", ""});
 
     Model popcorn{"assets", "popcorn_model_a.glb"};
     popcorn.draw(shader);