Merge r199 from branches/5.0:

Port a change from MySQL.

Bug#8841 - CHECKSUM TABLE is broken in MyISAM
Fixed test results.

mysql-test/innodb.result

@@ -1457,16 +1457,16 @@ Error	1146	Table 'test.t4' doesn't exist
 checksum table t1, t2, t3, t4;
 Table	Checksum
 test.t1	2948697075
-test.t2	3835700799
-test.t3	3835700799
+test.t2	2948697075
+test.t3	2948697075
 test.t4	NULL
 Warnings:
 Error	1146	Table 'test.t4' doesn't exist
 checksum table t1, t2, t3, t4 extended;
 Table	Checksum
-test.t1	3092701434
-test.t2	3835700799
-test.t3	3835700799
+test.t1	2948697075
+test.t2	2948697075
+test.t3	2948697075
 test.t4	NULL
 Warnings:
 Error	1146	Table 'test.t4' doesn't exist