No such problem for me on Windows with Net-SLeay-1.77 and openssl 1.0.2h.

Are you using a Microsoft Compiler ?
Line 6060 is:

int first = OCSP_resp_find(bsr, certid, -1);
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I've struck scoping issues like this with MS compilers before.

Try changing line 6060 to:

first = OCSP_resp_find(bsr, certid, -1);
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and then change line 6030 to:

int i,want_array, first;
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Cheers,
Rob