message: Fix undefined behavior
diff: @@ -121,8 +121,7 @@ git_delta_t Patch::status() const
  if (!d) {
  // can occur, when nothing is staged
  // so the staged patch is empty
  - git_delta_t delta;
  - return delta;
  + return GIT_DELTA_UNMODIFIED;
  }
  return git_patch_get_delta(d.data())->status;
  }
  