dbi_result_get_binary(), dbi_result_get_binary_idx(), dbi_result_get_binary_copy(), dbi_result_get_binary_copy_idx(): fixed signedness of error return strings
dbi_result_get_binary(), dbi_result_get_binary_idx(), dbi_result_get_binary_copy(), dbi_result_get_binary_copy_idx(): fixed signedness of error return strings

balabit/libdbi,balabit/libdbi,balabit/libdbi