typo fix in ha_partition::rnd_pos(), status wasn't updated

mysql-test/r/partition_explicit_prune.result

@@ -805,6 +805,7 @@ WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0;
 VARIABLE_NAME	VARIABLE_VALUE
 HANDLER_COMMIT	1
 HANDLER_READ_KEY	1
+HANDLER_READ_RND	1
 HANDLER_TMP_WRITE	22
 HANDLER_UPDATE	2
 # 1 commit
@@ -837,6 +838,7 @@ SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS
 WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0;
 VARIABLE_NAME	VARIABLE_VALUE
 HANDLER_READ_KEY	1
+HANDLER_READ_RND	1
 HANDLER_ROLLBACK	1
 HANDLER_TMP_WRITE	22
 HANDLER_UPDATE	1
@@ -852,6 +854,7 @@ SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS
 WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0;
 VARIABLE_NAME	VARIABLE_VALUE
 HANDLER_READ_KEY	1
+HANDLER_READ_RND	1
 HANDLER_ROLLBACK	1
 HANDLER_TMP_WRITE	22
 HANDLER_UPDATE	1
@@ -870,6 +873,7 @@ VARIABLE_NAME	VARIABLE_VALUE
 HANDLER_COMMIT	1
 HANDLER_DELETE	1
 HANDLER_READ_KEY	1
+HANDLER_READ_RND	1
 HANDLER_TMP_WRITE	22
 HANDLER_UPDATE	1
 HANDLER_WRITE	1
@@ -922,6 +926,7 @@ WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0;
 VARIABLE_NAME	VARIABLE_VALUE
 HANDLER_COMMIT	2
 HANDLER_READ_KEY	1
+HANDLER_READ_RND	1
 HANDLER_READ_RND_NEXT	26
 HANDLER_TMP_WRITE	47
 HANDLER_UPDATE	2
@@ -935,6 +940,7 @@ VARIABLE_NAME	VARIABLE_VALUE
 HANDLER_COMMIT	3
 HANDLER_DELETE	1
 HANDLER_READ_KEY	2
+HANDLER_READ_RND	2
 HANDLER_READ_RND_NEXT	52
 HANDLER_TMP_WRITE	72
 HANDLER_UPDATE	3
@@ -950,6 +956,7 @@ VARIABLE_NAME	VARIABLE_VALUE
 HANDLER_COMMIT	3
 HANDLER_DELETE	1
 HANDLER_READ_KEY	2
+HANDLER_READ_RND	2
 HANDLER_READ_RND_NEXT	78
 HANDLER_TMP_WRITE	97
 HANDLER_UPDATE	3
@@ -1222,7 +1229,7 @@ HANDLER_DELETE	6
 HANDLER_READ_FIRST	1
 HANDLER_READ_KEY	2
 HANDLER_READ_NEXT	2
-HANDLER_READ_RND	2
+HANDLER_READ_RND	4
 HANDLER_READ_RND_NEXT	16
 HANDLER_TMP_WRITE	22
 # 4 delete (2 in t2 + 2 in t3)

sql/ha_partition.cc

@@ -4916,7 +4916,7 @@ int ha_partition::rnd_pos(uchar * buf, uchar *pos)
   file= m_file[part_id];
   DBUG_ASSERT(bitmap_is_set(&(m_part_info->read_partitions), part_id));
   m_last_part= part_id;
-  DBUG_RETURN(file->rnd_pos(buf, (pos + PARTITION_BYTES_IN_POS)));
+  DBUG_RETURN(file->ha_rnd_pos(buf, (pos + PARTITION_BYTES_IN_POS)));
 }