Makng sure that LIMIT 0 works in this case to:

select sql_calc_found_rows * from table limit 0;
It does ...

mysql-test/r/select_found.result

@@ -178,4 +178,9 @@ titre	numeropost	maxnumrep
 SELECT FOUND_ROWS();
 FOUND_ROWS()
 2
+SELECT SQL_CALC_FOUND_ROWS * FROM t1 LIMIT 0;
+titre	numeropost	maxnumrep
+SELECT FOUND_ROWS();
+FOUND_ROWS()
+3
 drop table t1;

mysql-test/t/select_found.test

@@ -88,4 +88,6 @@ SELECT SQL_CALC_FOUND_ROWS 1 FROM (SELECT 1) LIMIT 0;
 SELECT FOUND_ROWS();
 SELECT SQL_CALC_FOUND_ROWS * FROM t1 WHERE numeropost > 1  LIMIT 0;
 SELECT FOUND_ROWS();
+SELECT SQL_CALC_FOUND_ROWS * FROM t1 LIMIT 0;
+SELECT FOUND_ROWS();
 drop table t1;