autoproto fails on struct declarations/definitions

[hemebond]

When enabling autoproto with #pragma autoproto, compilation fails on struct declarations:

compiling qc/cl_defs.qc
qc/cl_defs.qc:1636: error: struct trisoup_simple_vert_s is already defined

Line 1636 is:

typedef struct trisoup_simple_vert_s {vec3 xyz;vec2 st;vec4 rgba;} trisoup_simple_vert_t;