Cleanup / Wextra

Added -Wextra and fixed warnings that appeared

Converted olcPixelGameEngine to unix line endings because it was
annoying me

CMakeLists.txt

@@ -4,7 +4,7 @@ project(main)
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED True)
 
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Werror")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -Werror")
 
 include_directories(src)
 add_definitions(-g)

src/app.cpp

@@ -20,6 +20,8 @@ bool App::OnUserCreate()
 
 bool App::OnUserUpdate(float delta)
 {
+    (void)delta;
+
     Vector2<int> screen = {ScreenWidth(), ScreenHeight()};
     Vector2<int> mouse = {GetMouseX(), GetMouseY()};
 

src/util/vector2.h

@@ -7,6 +7,7 @@ class Vector2 {
     public:
         Vector2() = default;
         Vector2(T x, T y) : m_x(x), m_y(y) {}
+        Vector2(const Vector2<T> &other) = default;
 
         T x() { return m_x; }
         T y() { return m_y; }