Re: [PATCH v3 5/5] format-rev: introduce builtin for on-demand pretty formatting

builtin/name-rev.c:883:8: error: variable 'commit' is used uninitialized whenever 'if' condition is false [-Werror,-Wsometimes-uninitialized]
  883 |                         if (peeled && peeled->type == OBJ_COMMIT)
      |                             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
builtin/name-rev.c:885:9: note: uninitialized use occurs here
  885 |                         if (!commit) {
      |                              ^~~~~~
builtin/name-rev.c:883:4: note: remove the 'if' if its condition is always true
  883 |                         if (peeled && peeled->type == OBJ_COMMIT)
      |                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  884 |                                 commit = (struct commit *)peeled;
builtin/name-rev.c:883:8: error: variable 'commit' is used uninitialized whenever '&&' condition is false [-Werror,-Wsometimes-uninitialized]
  883 |                         if (peeled && peeled->type == OBJ_COMMIT)
      |                             ^~~~~~
builtin/name-rev.c:885:9: note: uninitialized use occurs here
  885 |                         if (!commit) {
      |                              ^~~~~~
builtin/name-rev.c:883:8: note: remove the '&&' if its condition is always true
  883 |                         if (peeled && peeled->type == OBJ_COMMIT)
      |                             ^~~~~~~~~
builtin/name-rev.c:867:25: note: initialize the variable 'commit' to silence this warning
  867 |                         struct commit *commit;
      |                                              ^
      |                                               = NULL
2 errors generated.