stupid mistake

--HG--
branch : pmacs2

buffer/__init__.py

@@ -659,6 +659,8 @@ class FileBuffer(Buffer):
             if self.changed_on_disk():
                 raise Exception, "oh no! %r has changed on-disk!" % self.path
 
+        exists = os.path.exists(self.path)
+        if exists:
             temp_path = self._temp_path()
             shutil.copyfile(self.path, temp_path)
 
@@ -672,12 +674,12 @@ class FileBuffer(Buffer):
             f2.write(self.bytemark + data)
             f2.close()
         except:
-            shutil.copyfile(temp_path, self.path)
+            if exists: shutil.copyfile(temp_path, self.path)
         else:
             self.store_checksum(data)
             self.modified = False
         finally:
-            os.unlink(temp_path)
+            if exists: os.unlink(temp_path)
     def save_as(self, path):
         self.path = path
         self.save()