Revert "lib/kadm5: do not prototype imported _krb5_put_int"

krb5_locl.h cannot be included from within lib/kadm5 in the
current UNIX builds.  Reverting this change which is necessary
to properly build on Windows until an alternate solution is
agreed upon.

This reverts commit ffc525aad1.

lib/kadm5/get_s.c

@@ -31,7 +31,6 @@
  * SUCH DAMAGE.
  */
 
-#include <krb5_locl.h>
 #include "kadm5_locl.h"
 #include <assert.h>
 
@@ -63,6 +62,9 @@ add_tl_data(kadm5_principal_ent_t ent, int16_t type,
     return 0;
 }
 
+KRB5_LIB_FUNCTION krb5_ssize_t KRB5_LIB_CALL
+_krb5_put_int(void *buffer, unsigned long value, size_t size); /* XXX */
+
 static
 krb5_error_code
 copy_keyset_to_kadm5(kadm5_server_context *context, krb5_kvno kvno,