Description of problem:

When the 'sessionname' is used to set the session name of a new screen session the terminal resizing works on window, but the 'tput' command still showing the initial size.

Version-Release number of selected component (if applicable):

screen-4.1.0-0.23.20120314git3c2946.el7_2.x86_64

How reproducible:


Steps to Reproduce:
1. Open a new window, could be used 'gnome-terminal' or 'xterm' command:

$ xterm

2. Create a screen configuration file setting a session name:

$ cat /tmp/screen-testing.rc 
sessionname TESTING

3. Execute the 'screen' command setting the configuration file and check the current terminal size:

$ screen -c /tmp/screen-testing.rc 
$ tput lines
24
$ tput cols
80

4. Resize the window and execute the 'tput' commands again:

$ tput lines
$ tput col

Actual results:
$ tput lines
24
$ tput cols
80

Expected results:
$ tput lines
34
$ tput cols
101

Additional info: