if (level < 2)
return -1; /* at least of form "heads/blah" */
- /* Do not allow ref name to end in "HEAD"
- * Note that cp is poiting at one past NUL at the end.
- * i.e. cp[-1] = NUL.
- */
- if (5 <= cp - ref && !strcmp(cp - 5, "HEAD"))
+ /* do not allow ref name to end in "HEAD" */
+ if (cp - ref > 4 && !strcmp(cp - 4, "HEAD"))
return -1;
return 0;