Check for children overwrite only in paranoia mode.

fuse/pathfilesystem.go

@@ -128,10 +128,13 @@ func (me *inode) setParent(newParent *inode) {
 	}
 	if newParent != nil {
 		me.Parent = newParent
+
+		if paranoia {
 			ch := me.Parent.Children[me.Name]
 			if ch != nil {
 				panic(fmt.Sprintf("Already have an inode with same name: %v: %v", me.Name, ch))
 			}
+		}
 		
 		me.Parent.Children[me.Name] = me
 	}