refactor condition

theano/scan_module/scan_opt.py

@@ -1046,8 +1046,8 @@ class ScanInplaceOptimizer(Optimizer):
         # an Alloc or an AllocEmpty
         for i in range(len(ls)):
             inp = ls[i]
-            if len(inp.clients) > 1:
-                if inp.owner and isinstance(inp.owner.op, (Alloc, AllocEmpty)):
+            if (len(inp.clients) > 1 and inp.owner and
+                    isinstance(inp.owner.op, (Alloc, AllocEmpty))):
                 ls[i] = inp.owner.op(*inp.owner.inputs)
 
         n_outs = len(ls)