Testcase for #674 added

mysql-test/r/sel000100.result:
  Result of the testcase added
mysql-test/t/sel000100.test:
  checking for bug #674 added

mysql-test/r/sel000100.result

@@ -26,3 +26,13 @@ ORDER BY link;
 key_link_id	link
 NULL	NULL
 drop table t1,t2;
+CREATE TABLE t1 (
+html varchar(5) default NULL,
+rin int(11) default '0',
+out int(11) default '0'
+) TYPE=MyISAM;
+INSERT INTO t1 VALUES ('1',1,0);
+SELECT DISTINCT html,SUM(out)/(SUM(rin)+1) as 'prod' FROM t1 GROUP BY rin;
+html	prod
+1	0.00
+drop table t1;

mysql-test/t/sel000100.test

@@ -29,3 +29,18 @@ GROUP BY t1.id
 ORDER BY link;
 
 drop table t1,t2;
+
+#
+# test case for #674
+#
+CREATE TABLE t1 (
+  html varchar(5) default NULL,
+  rin int(11) default '0',
+  out int(11) default '0'
+) TYPE=MyISAM;
+
+INSERT INTO t1 VALUES ('1',1,0);
+
+SELECT DISTINCT html,SUM(out)/(SUM(rin)+1) as 'prod' FROM t1 GROUP BY rin;
+
+drop table t1;