Fix #1114

[jlaurens]

Use of a NULL pointer in synctex_parser.c

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 34.46%. Comparing base (b5c927a) to head (cc52746).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1115   +/-   ##
=======================================
  Coverage   34.46%   34.46%           
=======================================
  Files         153      153           
  Lines       17591    17591           
  Branches     2420     2420           
=======================================
  Hits         6063     6063           
  Misses      11528    11528           

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[stloeffler]

Thanks a lot - merged.