[bug #66079] [troff] uninitialized local `s` potentially used in `token::add_to_zero_width_node_list()`

[G. Branden Robinson]

Update of bug #66079 (group groff):

                  Status:             In Progress => Fixed                  
             Open/Closed:                    Open => Closed                 
         Planned Release:                    None => 1.24.0                 
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Follow-up Comment #3:


commit f0086085a82538329d58ee8ac9f6c1dde906de29
Author: Lukas Javorsky <ljavo...@redhat.com>
Date:   Mon Aug 12 13:46:56 2024 +0000

    [troff]: Fix Savannah #66079.
    
    * src/roff/troff/input.cpp (token::add_to_zero_width_node_list):
      Initialize stack-allocated variable that is not populated by all paths
      through this function.
    
    Fixes <https://savannah.gnu.org/bugs/?66079>.
    
    [Also throw the developer a bone by annotating what this variable is
    _for_. --GBR]




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