fix for #59: compiler crash when special signatures where declared with cdef

Cython/Compiler/ModuleNode.py

@@ -872,7 +872,7 @@ class ModuleNode(Nodes.Node, Nodes.BlockNode):
             else:
                 code.put_init_var_to_py_none(entry, "p->%s")
         entry = scope.lookup_here("__new__")
-        if entry:
+        if entry and entry.is_special:
             if entry.trivial_signature:
                 cinit_args = "o, %s, NULL" % Naming.empty_tuple
             else:

tests/errors/cdefspecial.pyx

+
+cdef class Test:
+    cdef __cinit__(self):
+        pass
+
+    cdef __len__(self):
+        pass
+
+_ERRORS = u"""
+3:9: Special methods must be declared with 'def', not 'cdef'
+6:9: Special methods must be declared with 'def', not 'cdef'
+"""