Missing `count` argument.

[Alexis Brodeur]

rusty-gl/src/buffers.rs

Line 65 in 57463e7

 pub fn gl_gen_buffer() -> VBO { 

[Matthew Hopson]

The purpose of that function is create a single VBO, rather than multiple.

Hence it is called gl_gen_buffer and not gl_gen_buffers, which is defined directly above