Fixed a bug where I was loading the wrong shader file for the screen shader, then made the kernel shader for the screen postprocessing.

21-framebuffers/src/shader.cpp

@@ -43,6 +43,7 @@ void check_error(const std::string& what, unsigned int thing, GLenum check_type)
 }
 
 unsigned int Shader::load_shader(const std::string& filename, GLenum shader_type) {
+  dbc::log($F("Loading shader {}", filename));
   dbc::check(fs::exists(filename),
       std::format("shader file {} does not exist", filename));