Cannot perform operations with const vectors.

[Alexandros Frantzis]

When trying to perform operations using const vectors I get compile time errors. For example, I would expect this to work:

const LibMatrix::vec2 v(1.0, 1.0);
const LibMatrix::vec2 p(2.0, 2.0);

LibMatrix::vec2 vp(v + p);

but it gives the following error:

error: no match for ‘operator+’ in ‘v + p’
note: candidates are:
note: const LibMatrix::tvec2<T> LibMatrix::tvec2<T>::operator+(const T&) [with T = float, LibMatrix::tvec2<T> = LibMatrix::tvec2<float>]
note: no known conversion for argument 1 from ‘const vec2 {aka const LibMatrix::tvec2<float>}’ to ‘const float&’
note: const LibMatrix::tvec2<T> LibMatrix::tvec2<T>::operator+(const LibMatrix::tvec2<T>&) [with T = float, LibMatrix::tvec2<T> = LibMatrix::tvec2<float>] <near match>
note: no known conversion for implicit ‘this’ parameter from ‘const vec2* {aka const LibMatrix::tvec2<float>*}’ to ‘LibMatrix::tvec2<float>*’

Similar errors occur for other operations involving const vectors and vectors or scalars.

[Jesse Barker (jesse-barker)]

Fixed at revision 24....