Convert some old-style string exceptions to class exceptions.
diff --git a/Lib/plat-irix6/flp.py b/Lib/plat-irix6/flp.py
index 9f1957f..6c6dae5 100644
--- a/Lib/plat-irix6/flp.py
+++ b/Lib/plat-irix6/flp.py
@@ -12,7 +12,8 @@
 FORMLINE = '=============== FORM ==============='
 ENDLINE = '=============================='
 
-error = 'flp.error'
+class error(Exception):
+    pass
 
 ##################################################################
 #    Part 1 - The parsing routines                               #