compiler: Pass the whole descriptor to buf_reuse cbk

Author: FabioLuporini

devito/passes/clusters/buffering.py

@@ -301,7 +301,7 @@ def _reuse(self, init, clusters, descriptors):
         buf_reuse = self.options['buf-reuse']
 
         if callable(buf_reuse):
-            cbk = lambda v: [i for i in v if buf_reuse(descriptors[i].f)]
+            cbk = lambda v: [i for i in v if buf_reuse(descriptors[i])]
         else:
             cbk = lambda v: v