Change getattr() of TimeStamp to use PyObject_GetAttrString().

When the import changed to be absolute rather than relative, the trick
of using the same Python string for the import and the getattr failed.

Add an assert() that TimeStamp is not NULL.

src/Persistence/cPersistence.c

@@ -14,7 +14,7 @@
 static char cPersistence_doc_string[] = 
 "Defines Persistent mixin class for persistent objects.\n"
 "\n"
-"$Id: cPersistence.c,v 1.63 2002/09/30 16:02:32 gvanrossum Exp $\n";
+"$Id: cPersistence.c,v 1.64 2002/10/01 15:06:17 jeremy Exp $\n";
 
 #include "cPersistence.h"
 
@@ -853,7 +853,8 @@ initcPersistence(void)
       Py_DECREF(s);
       return;
   }
-  TimeStamp = PyObject_GetAttr(m, s);
+  TimeStamp = PyObject_GetAttrString(m, "TimeStamp");
+  assert(TimeStamp);
   Py_DECREF(m);
   Py_DECREF(s);
 

src/ZODB/cPersistence.c

@@ -14,7 +14,7 @@
 static char cPersistence_doc_string[] = 
 "Defines Persistent mixin class for persistent objects.\n"
 "\n"
-"$Id: cPersistence.c,v 1.63 2002/09/30 16:02:32 gvanrossum Exp $\n";
+"$Id: cPersistence.c,v 1.64 2002/10/01 15:06:17 jeremy Exp $\n";
 
 #include "cPersistence.h"
 
@@ -853,7 +853,8 @@ initcPersistence(void)
       Py_DECREF(s);
       return;
   }
-  TimeStamp = PyObject_GetAttr(m, s);
+  TimeStamp = PyObject_GetAttrString(m, "TimeStamp");
+  assert(TimeStamp);
   Py_DECREF(m);
   Py_DECREF(s);
 

src/persistent/cPersistence.c

@@ -14,7 +14,7 @@
 static char cPersistence_doc_string[] = 
 "Defines Persistent mixin class for persistent objects.\n"
 "\n"
-"$Id: cPersistence.c,v 1.63 2002/09/30 16:02:32 gvanrossum Exp $\n";
+"$Id: cPersistence.c,v 1.64 2002/10/01 15:06:17 jeremy Exp $\n";
 
 #include "cPersistence.h"
 
@@ -853,7 +853,8 @@ initcPersistence(void)
       Py_DECREF(s);
       return;
   }
-  TimeStamp = PyObject_GetAttr(m, s);
+  TimeStamp = PyObject_GetAttrString(m, "TimeStamp");
+  assert(TimeStamp);
   Py_DECREF(m);
   Py_DECREF(s);