[Vala] Fixed size multidimensional array

[Ivan Trombley <itrombley dot-borg org>]

Can anyone tell me how I can declare a fixed size multidimensional
array? Trying this just gives me an error:

float matrix[3, 3];

error: syntax error, expected `]'
       float matrix[3, 3];
                     ^

This is using valac 0.34.8 BTW.