Persistence: Make it compile

201-persist/Makefile

-PICS=point-localization
+PICS=point-localization fat-nodes path-copying
 
 TOP=..
 

201-persist/persist.tex

@@ -148,7 +148,7 @@ First B is inserted as a left child of A, then C is inserted as a left child of
 These operations are captured by a schema of fat vertices in figure \figref{taf-nodes}. 
 Inverse pointers for the latest version are dotted.
 
-\figure[fat-nodes]{fat-nodes.pdf}{Fat Nodes}
+\figure[fat-nodes]{fat-nodes.pdf}{}{Fat Nodes}
 
 To take advantage of fat nodes, we need the balancing algorithm to limit the number of vertices that change in one operation. 
 It is sufficient that the changes can be amortized to a constant number per update.