contrib / coccinelle / free.coccion commit travis: run tests with GIT_TEST_SPLIT_INDEX (ae59a4e)
   1@@
   2expression E;
   3@@
   4- if (E)
   5  free(E);
   6
   7@@
   8expression E;
   9@@
  10- if (!E)
  11  free(E);
  12
  13@@
  14expression E;
  15@@
  16- free(E);
  17+ FREE_AND_NULL(E);
  18- E = NULL;