[code] use 0 cols and rows as default pty size

[akosyakov]

What it does

• fix [vscode] terminals resizing issues on reload #3553: the pty can produce data before the initial size is provided, so instead of setting (1, 1) as initial size, we set (0, 0) meaning that pty should use internal default which later get overridden by the initial size

Change in Gitpod Code: gitpod-io/openvscode-server@cee6bf3

How to test

• Start a workspace.
• Emulate slow connection on OS level, start a new terminal.
• You should not see anything like your 131072x1 screen size is bogus. expect trouble
• Some content thought can be resized bogusly since it was produced before the initial resize but after that the size should be correct. You can verify current size with stty -a

[jankeromnes]

Code change looks good & reliably fixes the problem.

Thanks for another cool fix!