Patch for PLPYTHONU - adding TD["relname"]

Excuse my English.
Patch allows to get triggers table name in the trigger TD['relname'].
Usefull when same trigger function applied to different tables.
patch for plpython.c in Postgres 8.1 beta (diff was applied to)
works also in Postgres 8.0.3 when placed in the same function (may be
different line numbers)

--- plpython-old.c    2005-07-10 08:56:55.000000000 +0400
+++ plpython.c    2005-10-04 12:03:36.000000000 +0400
@@ -582,7 +582,8 @@ PLy_trigger_build_args(FunctionCallInfo
                *pltevent,
                *pltwhen,
                *pltlevel,
-               *pltrelid;
+               *pltrelid,
+               *pltrelname;
     PyObject   *pltargs,
                *pytnew,
                *pytold;
@@ -606,6 +607,12 @@ PLy_trigger_build_args(FunctionCallInfo
         Py_DECREF(pltrelid);
         pfree(stroid);

+        stroid = SPI_getrelname(tdata->tg_relation);
+        pltrelname = PyString_FromString(stroid);
+        PyDict_SetItemString(pltdata, "relname", pltrelname);
+        Py_DECREF(pltrelname);
+        pfree(stroid);
+
         if (TRIGGER_FIRED_BEFORE(tdata->tg_event))
             pltwhen = PyString_FromString("BEFORE");
         else if (TRIGGER_FIRED_AFTER(tdata->tg_event))