Mischael's fix for "IMAP KIO process dies (due to trailing nulls?)"

BUG: 153885

Cherry-picked from: 1d8208d3815088eea3c36767acb0c5a0a1a61ec8

Signed-off-by: Luke Dashjr <luke-jr+git@utopios.org>

tdeioslave/imap4/imapinfo.cc

@@ -196,6 +196,9 @@ ulong imapInfo::_flags (const TQCString & inFlags)
   ulong flags = 0;
   parseString flagsString;
   flagsString.data.duplicate(inFlags.data(), inFlags.length());
+  if ( flagsString.isEmpty() ) {
+    return flags;
+  }
 
   if (flagsString[0] == '(')
     flagsString.pos++;