Clear struct on Undef

harbour/ChangeLog

@@ -1,3 +1,7 @@
+20000319-01:35 EST Paul Tucker <ptucker@sympatico.ca>
+   * source/pp/ppcore.c
+     from  20000319-01:30 that didn't get posted.
+
 20000319-19:11 GMT+1 Victor Szakats <info@szelvesz.hu>
    * include/hbapigt.h
      source/rtl/gtapi.c

harbour/source/pp/ppcore.c

@@ -456,6 +456,8 @@ static int ParseUndef( char * sLine )
        if( stdef->value ) hb_xfree( stdef->value );
        hb_xfree( stdef->name );
     }
+    stdef->pars = NULL;
+    stdef->value = NULL;
     stdef->name = NULL;
   }