Revert "Implement valorDefault in C"

This reverts commit e570b82.

Backing this out to bring back my previous work with the
Unspecified module

Conflicts:

	src/Template.py

Signed-off-by: James Abbatiello <abbeyj@gmail.com>

src/c/_template.c

@@ -9,18 +9,18 @@
 extern "C" {
 #endif
 
+static PyObject *unspecifiedModule = NULL;
+static PyObject *unspecified = NULL;
+
 static PyObject *py_valordefault(PyObject *self, PyObject *args, PyObject *kwargs)
 {
-    PyObject *value, *def;
+    PyObject *value, *def, *res;
 
     if (!PyArg_ParseTuple(args, "OO", &value, &def))
         return NULL;
 
-    if (value == Py_None) {
-        Py_XINCREF(def);
+    if (value == unspecified)
         return def;
-    }
-    Py_XINCREF(value);
     return value;
 }
 
@@ -36,6 +36,12 @@ PyMODINIT_FUNC init_template()
 {
     PyObject *module = Py_InitModule3("_template", _template_methods, 
             _template_doc);
+    unspecifiedModule = PyImport_ImportModule("Cheetah.Unspecified");
+    if ( (PyErr_Occurred()) || (!unspecifiedModule) )
+        return NULL;
+    unspecified = PyObject_GetAttrString(unspecifiedModule, "Unspecified");
+    if (PyErr_Occurred())
+        return NULL;
 }
 
 #ifdef __cplusplus