SELinux: change sbsec->behavior to short

We only have 6 options, so char is good enough, but use a short as that
packs nicely.  This shrinks the superblock_security_struct just a little
bit.

Signed-off-by: Eric Paris <eparis@redhat.com>

security/selinux/include/objsec.h

@@ -58,7 +58,7 @@ struct superblock_security_struct {
 	u32 sid;			/* SID of file system superblock */
 	u32 def_sid;			/* default SID for labeling */
 	u32 mntpoint_sid;		/* SECURITY_FS_USE_MNTPOINT context for files */
-	unsigned int behavior;		/* labeling behavior */
+	unsigned short behavior;	/* labeling behavior */
 	unsigned short flags;		/* which mount options were specified */
 	struct mutex lock;
 	struct list_head isec_head;

security/selinux/include/security.h

@@ -171,7 +171,7 @@ int security_get_allow_unknown(void);
 #define SECURITY_FS_USE_NONE		5 /* no labeling support */
 #define SECURITY_FS_USE_MNTPOINT	6 /* use mountpoint labeling */
 
-int security_fs_use(const char *fstype, unsigned int *behavior,
+int security_fs_use(const char *fstype, short unsigned int *behavior,
 	u32 *sid);
 
 int security_genfs_sid(const char *fstype, char *name, u16 sclass,

security/selinux/ss/services.c

@@ -2329,7 +2329,7 @@ out:
  */
 int security_fs_use(
 	const char *fstype,
-	unsigned int *behavior,
+	short unsigned int *behavior,
 	u32 *sid)
 {
 	int rc = 0;