remove from mapping, and use .keys() since we modify the dictionary..

[git-p4: depot-paths = "//depot/": change = 772]

FSStorage.py

@@ -122,10 +122,11 @@ class FSDirectory(FSObject, StorageFolder):
 		# We need to rescan this dir, and see if our children has
 		# changed any.
 		children = sets.Set(os.listdir(self.FSpath))
-		for i in self.pathObjmap:
+		for i in self.pathObjmap.keys():
 			if i not in children:
 				# delete
 				self.cd.delItem(self.pathObjmap[i])
+				del self.pathObjmap[i]
 
 		for i in children:
 			fname = os.path.join(self.FSpath, i)