Avoid checking for nullpointers in automatic cypclass lock acquisition

Cython/Compiler/ExprNodes.py

@@ -14199,16 +14199,16 @@ class CoerceToLockedNode(CoercionNode):
     def generate_result_code(self, code):
         # Acquire the lock.
         if self.rlock_only:
-            code.putln("Cy_RLOCK(%s);" % self.result())
+            code.putln("%s->CyObject_RLOCK();" % self.result())
         else:
-            code.putln("Cy_WLOCK(%s);" % self.result())
+            code.putln("%s->CyObject_WLOCK();" % self.result())
 
     def generate_disposal_code(self, code):
         # Release the lock.
         if self.rlock_only:
-            code.putln("Cy_UNRLOCK(%s);" % self.result())
+            code.putln("%s->CyObject_UNRLOCK();" % self.result())
         else:
-            code.putln("Cy_UNWLOCK(%s);" % self.result())
+            code.putln("%s->CyObject_UNWLOCK();" % self.result())
 
         # The subexpressions of self.arg are disposed-of and freed
         # as soon as self.arg is evaluated because it is a temporary.