Fix for very big pid and tid numbers in logcat_text

There can be no space after pid colon if tid is big enough
in logcat long format.

Change-Id: I8e03e78c88e4bef1a5fdb3a04b77f58fa7d055bc
Reviewed-on: https://code.wireshark.org/review/5411
Reviewed-by: Michal Labedzki <michal.labedzki@tieto.com>