--- interface.py.orig	2004-08-13 15:30:01 +0400
+++ maptool/interface.py	2007-12-28 02:17:18 +0300
@@ -73,7 +73,7 @@ class base_object:
     def activate(self):
         """Activate if deactivated, returns nonzero on success"""
 
-        if self.isactive = 0:
+        if self.isactive == 0:
             self.isactive = 1
             return(1)
         else:
@@ -82,7 +82,7 @@ class base_object:
     def deactivate(self):
         """Deactivate if activated, returns nonzero on success"""
 
-        if self.isactive = 1:
+        if self.isactive == 1:
             self.isactive = 0
             return(1)
         else: