Only update size when values are valid

In some environments the ioctl call for window size will return 0x0, for instance in serial console setups. This causes the input to be truncated making it hard for users to see what they are typing. This performs a check to see if either width or height has a non-zero value before updating the size.

getline.go

@@ -33,8 +33,9 @@ var _ tea.Model = (*Editor)(nil)
 func (m *Editor) Update(imsg tea.Msg) (tea.Model, tea.Cmd) {
 	switch msg := imsg.(type) {
 	case tea.WindowSizeMsg:
-		m.Model.SetSize(msg.Width, msg.Height)
-
+		if msg.Width != 0 || msg.Height != 0 {
+			m.Model.SetSize(msg.Width, msg.Height)
+		}
 	case editline.InputCompleteMsg:
 		return m, tea.Quit
 	}