Usage of non C99 features

[KlemenPl]

For example:

typedef struct 
{
    union 
    {
        f32 xy[2];
        struct 
        {
            f32 x, y;
        };
    };
} gs_vec2;

This would not compile on a compiler only supporting C99 without extensions. When compiling with -pedantic -std=c99 flags it would yield: warning: anonymous unions are a C11 extension [-Wc11-extensions]... Using anonymous unions and structs is not supported in C99 standard. It was introduced in C11 standard.

[MrFrenik]

Thanks for pointing this out. I'll switch these unions to being named to fix it.