Backport a fix from "trunk" into 5.5.1 which came after cloning only.

Original comment:

revno: 2930
| revision-id: alik@sun.com-20091223120351-m6l2t721tvtsiumu
| parent: alik@sun.com-20091223104155-cq3uw9l2yvg6jmgc
| committer: Alexander Nozdrin <alik@sun.com>
| branch nick: mysql-trunk-bugfixing
| timestamp: Wed 2009-12-23 15:03:51 +0300
| message:
|   Backporting fix for Bug#49834 from mysql-next-mr-bugfixing
|   into mysql-trunk-bugfixing.
| 
|   Original revision:
|   ------------------------------------------------------------
|     revision-id: vvaintroub@mysql.com-20091222115311-bam0xorumd8gvjyo
|     parent: mattias.jonsson@sun.com-20091221104426-x2e6c93x8iik4fo0
|     committer: Vladislav Vaintroub <vvaintroub@mysql.com>
|     branch nick: mysql-next-mr-bugfixing
|     timestamp: Tue 2009-12-22 12:53:11 +0100
|     message:
|       Bug#49834 - fixed a bug introduced by mismerge.
|   	restore original innobase version

storage/innobase/CMakeLists.txt

@@ -86,5 +86,10 @@ IF (MYSQL_VERSION_ID GREATER "50137")
 		SET_TARGET_PROPERTIES(ha_innobase PROPERTIES OUTPUT_NAME ha_innodb)
 	ENDIF(LIB_LOCATION)
 ELSE (MYSQL_VERSION_ID GREATER "50137")
-	MYSQL_STORAGE_ENGINE(INNODB_PLUGIN)
+	IF (NOT SOURCE_SUBLIBS)
+		ADD_DEFINITIONS(-D_WIN32 -DMYSQL_SERVER)
+		ADD_LIBRARY(innobase STATIC ${INNOBASE_SOURCES})
+		# Require mysqld_error.h, which is built as part of the GenError
+		ADD_DEPENDENCIES(innobase GenError)
+	ENDIF (NOT SOURCE_SUBLIBS)
 ENDIF (MYSQL_VERSION_ID GREATER "50137")