Making applications exit if they can't connect to the session bus

[Thiago Macieira]

I don't understand why, but r635466 had this patch in it:
   if (!QDBusConnection::sessionBus().isConnected() || !(bus = 
QDBusConnection::sessionBus().interface())) {
-      kFatal(101) << "Session bus not found" << endl;
-      ::exit(125);
   }

It looks to me that Coolo committed some testing code of his. In any case, the 
effect is now that, if QtDBus cannot connect to the session bus, applications 
(not unique applications) will crash in bizarre ways later on. For instance, 
konqueror crashes trying to contact klauncher, due to a null-pointer 
dereference.

Does anyone mind if I commit the attached patch, restoring the code that was 
there?

-- 
  Thiago Macieira  -  thiago (AT) macieira.info - thiago (AT) kde.org
    PGP/GPG: 0x6EF45358; fingerprint:
    E067 918B B660 DBD1 105C  966C 33F5 F005 6EF4 5358
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