des: Fixed compilation warning from commit 613e5022

curl_ntlm_core.c:150: warning 'Curl_des_set_odd_parity' undefined;
                      assuming extern returning int

lib/curl_des.c

@@ -60,4 +60,4 @@ void Curl_des_set_odd_parity(unsigned char *bytes, size_t len)
   }
 }
 
-#endif /* USE_NTLM && (!USE_OPENSSL || HAVE_BORINGSSL) */
+#endif /* USE_NTLM && !HAVE_DES_SET_ODD_PARITY */

lib/curl_des.h

@@ -29,6 +29,6 @@
 /* Applies odd parity to the given byte array */
 void Curl_des_set_odd_parity(unsigned char *bytes, size_t length);
 
-#endif /* USE_NTLM && (!USE_OPENSSL || HAVE_BORINGSSL) */
+#endif /* USE_NTLM && !HAVE_DES_SET_ODD_PARITY */
 
 #endif /* HEADER_CURL_DES_H */