Fixed BUG#5279: Stored procedure packets out of order if CHECKSUM TABLE.

mysql-test/r/sp.result:
  New testcase for BUG#5251.
mysql-test/t/sp.test:
  New testcase for BUG#5251.
sql/sp_head.cc:
  Added checksum to the list of statements that return result sets.

mysql-test/r/sp.result

@@ -1755,6 +1755,15 @@ where  db='test' and name='bug5251' and created = @c1|
 count(*)
 1
 drop procedure bug5251|
+create procedure bug5251()
+checksum table t1|
+call bug5251()|
+Table	Checksum
+test.t1	0
+call bug5251()|
+Table	Checksum
+test.t1	0
+drop procedure bug5251|
 drop table if exists fac|
 create table fac (n int unsigned not null primary key, f bigint unsigned)|
 create procedure ifac(n int unsigned)

mysql-test/t/sp.test

@@ -1914,6 +1914,16 @@ select count(*) from mysql.proc
 
 drop procedure bug5251|
 
+#
+# BUG#5279: Stored procedure packets out of order if CHECKSUM TABLE
+#
+create procedure bug5251()
+  checksum table t1|
+
+call bug5251()|
+call bug5251()|
+drop procedure bug5251|
+
 
 #
 # Some "real" examples

sql/sp_head.cc

@@ -56,6 +56,7 @@ sp_multi_results_command(enum enum_sql_command cmd)
 {
   switch (cmd) {
   case SQLCOM_ANALYZE:
+  case SQLCOM_CHECKSUM:
   case SQLCOM_HA_READ:
   case SQLCOM_SHOW_BINLOGS:
   case SQLCOM_SHOW_BINLOG_EVENTS: