Clean up some code to avoid visual clutter.

Cython/Compiler/ExprNodes.py

@@ -1918,17 +1918,17 @@ class NameNode(AtomicExprNode):
 
     def analyse_types(self, env):
         self.initialized_check = env.directives['initializedcheck']
-        if self.entry is None:
-            self.entry = env.lookup(self.name)
-        if not self.entry:
-            self.entry = env.declare_builtin(self.name, self.pos)
-            if self.entry and self.entry.is_builtin and self.entry.is_const:
+        entry = self.entry
+        if entry is None:
+            entry = env.lookup(self.name)
+            if not entry:
+                entry = env.declare_builtin(self.name, self.pos)
+                if entry and entry.is_builtin and entry.is_const:
                     self.is_literal = True
-        if not self.entry:
+            if not entry:
                 self.type = PyrexTypes.error_type
                 return self
-        entry = self.entry
-        if entry:
+            self.entry = entry
         entry.used = 1
         if entry.type.is_buffer:
             from . import Buffer