mark CreateImageKHR function as unsafe

[kitcatier]

rust-egl/src/eglext.rs

Lines 45 to 60 in 7a2d4b1

	pub fn CreateImageKHR(dpy: EGLDisplay, context: EGLContext, target: EGLenum,
	buffer: EGLClientBuffer, attrib_list: *const EGLint) -> EGLImageKHR {
	unsafe {
	let name = ffi::CString::new("eglCreateImageKHR").unwrap();
	let addr = eglGetProcAddress(name.as_ptr() as *const _);
	if addr == ptr::null() {
	panic!("Unable to find an entry point for eglCreateImageKHR");
	}
	let eglCreateImageKHR: extern "C" fn(dpy: EGLDisplay, context: EGLContext, target: EGLenum,
	buffer: EGLClientBuffer, attrib_list: *const EGLint) -> EGLImageKHR = mem::transmute(addr);
	return eglCreateImageKHR(dpy, context, target, buffer, attrib_list);
	}
	}

Hello, if a function's entire body is unsafe, the function is itself unsafe and should be marked appropriately, which will make the caller ignore the safety requirements that the function parameters must guarantee, the developer who calls the CreateImageKHR function may not notice this safety requirement.
Marking them unsafe also means that callers must make sure they know what they're doing.