Correct format string

L was used for Py_ssize_t which was very wrong.

Also changed to use original row object passed in
rather than whatever PySequence_Fast converted it
to

Author: rogerbinns

src/session.c

@@ -2362,7 +2362,7 @@ APSWChangesetBuilder_row(APSWChangesetBuilder *self, int new, PyObject *row)
 
   change_failed:
     SET_EXC(res, NULL);
-    AddTraceBackHere(__FILE__, __LINE__, "builder_row", "{s: O, s: L, s: O}", "row", row_fast, "column", i, "value",
+    AddTraceBackHere(__FILE__, __LINE__, "builder_row", "{s: O, s: n, s: O}", "row", row, "column", i, "value",
                      value);
     break;
   }