vidjil.cpp: -c segment, do not indicate a germline when there were zero kmers

Closes #3343.
Status Job ID Name Coverage
  Test Tools
passed #130713
test_tools

00:00:04

 
  Test Unit
failed #130714
test_algo_unit

00:02:55

passed #130715
test_tools_unit

00:00:05

 
  Test Functional
skipped #130716
test_algo_should
 
  Test Shouldvdj
skipped #130717
test_algo_shouldvdj
 
  Coverage
skipped #130718
algo_coverage
 
  Prepare Release
skipped #130719
allowed to fail manual
prepare_release
 
  Valgrind Unit
skipped #130720
valgrind
algo_valgrind_unit
 
  Valgrind Functional
skipped #130721
valgrind allowed to fail manual
algo_valgrind_functional
 
Name Stage Failure
failed
test_algo_unit Test Unit There is an unknown failure, please try again
make[2]: *** [test] Segmentation fault
make[2]: Leaving directory '/home/gitlab-runner/builds/fcaaa996/0/vidjil/vidjil/algo/tests'
Makefile:174: recipe for target 'unit' failed
make[1]: *** [unit] Error 2
make[1]: Leaving directory '/home/gitlab-runner/builds/fcaaa996/0/vidjil/vidjil/algo'
Makefile:209: recipe for target 'unit_coverage' failed
make: *** [unit_coverage] Error 2
make: Leaving directory '/home/gitlab-runner/builds/fcaaa996/0/vidjil/vidjil/algo'
ERROR: Job failed: exit status 1