neteja tidy: ranges::fill, default member init, NOLINT _USE_MATH_DEFINES

source/core/resources/resource_loader.hpp

@@ -11,9 +11,9 @@ class ResourcePack;
 class ResourceLoader {
    private:
     static std::unique_ptr<ResourceLoader> instance;
-    ResourcePack* resource_pack_;
+    ResourcePack* resource_pack_ = nullptr;
     std::string pack_path_;
-    bool fallback_to_files_;
+    bool fallback_to_files_ = true;
 
     ResourceLoader();