In the special case that handles selecting a session and hitting Enter,

there is a structure copy of a Config, which invalidated the remote_cmd_ptr
in that structure (pointing to its own remote_cmd).
This was causing remote commands not to be executed in this special case.
I've patched the pointer up manually (as is done in plink.c), but ugh.

git-svn-id: svn://svn.tartarus.org/sgt/putty@4140 cda61777-01e9-0310-a592-d414129be87e