Fix "ISO C++ 11 does not allow converting from string literal to char*"

include/rewindow/types/key.h

@@ -26,8 +26,8 @@ private:
 public:
     static std::vector<Key> GetKeyboard();
     Key();
-    Key(char* charcode, X11Scancode scancode, WindowsScancode wSc);
-    char* CharCode;
+    Key(const char* charcode, X11Scancode scancode, WindowsScancode wSc);
+    const char* CharCode;
     X11Scancode x11ScanCode;
     WindowsScancode winScanCode;
     bool operator==(const Key& rhs) const;
@@ -139,8 +139,8 @@ class GamepadButton {};
 class MouseButton {
 public:
     MouseButton();
-    MouseButton(char* charcode);
-    char* CharCode;
+    explicit MouseButton(const char* charcode);
+    const char* CharCode;
 };
 
 using J3ML::LinearAlgebra::Vector2;

src/rewindow/types/key.cpp

@@ -9,7 +9,7 @@ Key::Key() {
     keyboard.push_back(*this);
 }
 
-Key::Key(char* charcode, X11Scancode scancode, WindowsScancode sc)
+Key::Key(const char* charcode, X11Scancode scancode, WindowsScancode sc)
         : CharCode(charcode), x11ScanCode(scancode), winScanCode(sc)
 {
     keyboard.push_back(*this);
@@ -18,7 +18,7 @@ Key::Key(char* charcode, X11Scancode scancode, WindowsScancode sc)
 MouseButton::MouseButton() {
 }
 
-MouseButton::MouseButton(char* charcode) {
+MouseButton::MouseButton(const char* charcode) {
     this->CharCode = charcode;
 }