cppcheck reports the following error:
fsutils/ipcfg/ipcfg_binary.c:332:15: error: Uninitialized variable: fd [uninitvar]
DEBUGASSERT(fd >= 0 && ipv6cfg != NULL);
Update the DEBUGASSERT() to match that of ipcfg_read_binary_ipv4(). fd is
uninitilized and doesn't need to be checked here.
Signed-off-by: Eero Nurkkala <eero.nurkkala@offcode.fi>
