[PATCH] ext3 build fix

Patch from Andreas Dilger <adilger@clusterfs.com>

If you have ext2_fs.h and ext3_fs.h included at the same time, we are
missing one define used in ext3_should_journal_data() and
ext3_should_order_data() as part of the test_opt() macro (which
defaults to the ext2 definition if both are present).

include/linux/ext3_fs.h

@@ -334,6 +334,7 @@ struct ext3_inode {
 #else
 #define EXT2_MOUNT_NOLOAD		EXT3_MOUNT_NOLOAD
 #define EXT2_MOUNT_ABORT		EXT3_MOUNT_ABORT
+#define EXT2_MOUNT_DATA_FLAGS		EXT3_MOUNT_DATA_FLAGS
 #endif
 
 #define ext3_set_bit			ext2_set_bit