[GFS2] lock function parameter

Fix function parameter typing:
fs/gfs2/glock.c:100: warning: function declaration isn't a prototype
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

fs/gfs2/glock.c

@@ -96,7 +96,7 @@ static inline rwlock_t *gl_lock_addr(unsigned int x)
 	return &gl_hash_locks[x & (GL_HASH_LOCK_SZ-1)];
 }
 #else /* not SMP, so no spinlocks required */
-static inline rwlock_t *gl_lock_addr(x)
+static inline rwlock_t *gl_lock_addr(unsigned int x)
 {
 	return NULL;
 }