message: Simplify split function
diff: @@ -60,7 +60,7 @@ pub unsafe fn get_gl_version(gl: &gl::Gl) -> Version {
  let version = version.split(' ').next().expect("glGetString(GL_VERSION) returned an empty \
  string");
  - let mut iter = version.split(move |c: char| c == '.');
  + let mut iter = version.split('.');
  let major = iter.next().unwrap();
  let minor = iter.next().expect("glGetString(GL_VERSION) did not return a correct version");
  