Avoid launching a session from the Default Settings, even if they do

represent a launchable session, unless the user can be construed to
have really meant it. This means:
 - starting up PuTTY when the Default Settings are launchable still
   brings up the config box, and you have to hit Open to actually
   launch that session
 - double-clicking on Default Settings from the config box will load
   them but not launch them.
On the other hand:
 - explicitly loading the Default Settings on the command line using
   `-load' _does_ still launch them.

[originally from svn r7265]

unix/gtkwin.c

@@ -3486,7 +3486,8 @@ int pt_main(int argc, char **argv)
 
 	cmdline_run_saved(&inst->cfg);
 
-	if (!cfg_launchable(&inst->cfg) && !cfgbox(&inst->cfg))
+	if ((!loaded_session || !cfg_launchable(&inst->cfg)) &&
+	    !cfgbox(&inst->cfg))
 	    exit(0);		       /* config box hit Cancel */
     }