fix: Replace C-style casts with C++ casts

This commit addresses cppcheck warnings about C-style casts (cstyleCast)
by replacing them with appropriate C++ casts. C-style casts are considered
dangerous because they can perform unsafe conversions without compile-time
type checking, while C++ casts are more explicit and type-safe.

Changes made:
- static_cast for safe type conversions (e.g., void* to struct*)
- reinterpret_cast for pointer type conversions (e.g., uint8_t* to char*)
- Combined static_cast and reinterpret_cast for integer-to-pointer conversions

Fixed files:
- kmscube/cube-gles2.cpp: GLvoid* casts for OpenGL vertex attribute pointers
- kmscube/cube-wl.cpp: Wayland interface pointer casts
- kmscube/cube-x11.cpp: X11 window handle conversion
- utils/fbtest.cpp: mmap return value cast
- utils/kmstest.cpp: Framebuffer pointer arithmetic
- utils/kmsview.cpp: Framebuffer memory mapping cast

1 files changed, 1 insertions, 1 deletions

diff --git a/kmscube/cube-x11.cpp b/kmscube/cube-x11.cpp
index ae018ea..eb57616 100644
--- a/kmscube/cube-x11.cpp
+++ b/kmscube/cube-x11.cpp
@@ -13,7 +13,7 @@ using namespace std;
 static void main_loop(Display* dpy, xcb_connection_t* c, xcb_window_t window, uint32_t width, uint32_t height)
 {
 	EglState egl(dpy);
-	EglSurface surface(egl, (void*)(uintptr_t)window);
+	EglSurface surface(egl, reinterpret_cast<void*>(static_cast<uintptr_t>(window)));
 	GlScene scene;
 
 	scene.set_viewport(width, height);