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, 3 insertions, 3 deletions

diff --git a/kmscube/cube-wl.cpp b/kmscube/cube-wl.cpp
index 136a4ed..95ad5c3 100644
--- a/kmscube/cube-wl.cpp
+++ b/kmscube/cube-wl.cpp
@@ -23,9 +23,9 @@ struct window {
 static void registry_add_object(void* data, struct wl_registry* registry, uint32_t name, const char* interface, uint32_t version)
 {
 	if (!strcmp(interface, "wl_compositor"))
-		s_compositor = (struct wl_compositor*)wl_registry_bind(registry, name, &wl_compositor_interface, 0);
+		s_compositor = static_cast<struct wl_compositor*>(wl_registry_bind(registry, name, &wl_compositor_interface, 0));
 	else if (!strcmp(interface, "wl_shell"))
-		s_shell = (struct wl_shell*)wl_registry_bind(registry, name, &wl_shell_interface, 0);
+		s_shell = static_cast<struct wl_shell*>(wl_registry_bind(registry, name, &wl_shell_interface, 0));
 }
 
 static void registry_remove_object(void* data, struct wl_registry* registry, uint32_t name)
@@ -41,7 +41,7 @@ static void shell_surface_ping(void* data, struct wl_shell_surface* shell_surfac
 
 static void shell_surface_configure(void* data, struct wl_shell_surface* shell_surface, uint32_t edges, int32_t width, int32_t height)
 {
-	struct window* window = (struct window*)data;
+	struct window* window = static_cast<struct window*>(data);
 
 	wl_egl_window_resize(window->egl_window, width, height, 0, 0);
 }