Fixed a crashing bug that would occur if mails were placed during an IMAP session in the root hierarchy of the IMAP directory structure with a non-NULL mailbox root prefix

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@9837 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/kits/mail/RemoteStorageProtocol.cpp

@@ -177,6 +177,9 @@ class UpdateHandler : public BHandler {
 							
 							if (dir == NULL)
 								dir = "";
+								
+							if (!_prot->mailboxes.HasItem(dir))
+								break;
 							
 							{
 								node_ref item_ref;
@@ -315,6 +318,9 @@ void BRemoteMailStorageProtocol::SyncMailbox(const char *mailbox) {
 	uint32 chain;
 	bool append;
 	
+	if (!mailboxes.HasItem(mailbox))
+		return; // -- Basic Sanity Checking
+	
 	while (folder.GetNextEntry(&entry) == B_OK) {
 		if (!entry.IsFile())
 			continue;