Fix pointer comparison

This resolves issue #1

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>

tdeio_ftps/ftp.cc

@@ -1266,7 +1266,7 @@ bool Ftp::ftpCloseCommand()
   kdDebug(7102) << "ftpCloseCommand: reading command result" << endl;
   m_bBusy = false;
 
-  if(ftpResponse(-1) <= 0 || (m_iRespType != 2) )
+  if(!ftpResponse(-1) || (m_iRespType != 2) )
   {
     kdDebug(7102) << "ftpCloseCommand: no transfer complete message" << endl;
     return false;