Fix conditional build.

Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>

src/fido/management.c

@@ -40,7 +40,9 @@ int man_select(app_t *a, uint8_t force) {
     apdu.ne = res_APDU_size;
     if (force) {
         scan_all();
+#ifdef ENABLE_OTP_APP
         init_otp();
+#endif
     }
     return PICOKEY_OK;
 }