bootctl: Fix the error checking for strtol result.

system/extras/bootctl/bootctl.c:136:13: warning: comparison is always false due to limited range of data type [-Wtype-limits]
     if (ret == LONG_MIN || ret == LONG_MAX) {

Change-Id: Id4816716e4c6d304c2ca531aadbcc62117ad7376
1 file changed