The combo --without-openssl and "make debug" fails to build

Some AES sourcery fails.

aes_func.h: In function ‘get_AES_enc128_CBC’:
aes.c:28:95: error: ‘openssl_AES_enc128_CBC’ undeclared (first use in this function); did you mean ‘intel_AES_enc128_CB ’?
   28 |  #define FUNC(r,p) aes_fptr_##r get_##p() { return check_for_aes_instructions() ? intel_##p : openssl_##p; }
      |                                                                                               ^~~~~~~~
aes_func.h:17:2: note: in expansion of macro ‘FUNC’
   17 |  FUNC(cbc, AES_enc##n##_CBC) \
      |  ^~~~
aes_func.h:22:1: note: in expansion of macro ‘FUNC_BITS’
   22 | FUNC_BITS(128)
      | ^~~~~~~~~
aes.c:28:95: note: each undeclared identifier is reported only once for each function it appears in
(...)

Reproduce the failure with the --without-openssl configuration followed by make debug. Start in aes.c and aes_func.h, where the missing openssl_AES_enc128_CBC symbol is expanded, and trace how the no-OpenSSL build selects implementations. Done means make debug builds successfully without OpenSSL.