Fixed bug on subclass instanciation and using 'del' on templates compile test

Cython/Compiler/PyrexTypes.py

 
+
 #
 #   Pyrex - Types
 #
@@ -1879,7 +1880,7 @@ class CppClassType(CType):
         if other_type.is_cpp_class:
             if self == other_type:
                 return 1
-            elif self.template_type == other_type.template_type:
+            elif self.template_type and self.template_type == other_type.template_type:
                 if self.templates == other_type.templates:
                     return 1
                 for t1, t2 in zip(self.templates, other_type.templates):

tests/compile/cpp_templates.pyx

@@ -26,3 +26,5 @@ c = e.getValue2()
 
 cdef char f = d.getValue2()
 f = e.getValue2()
+
+del b, e