c
if (sp->bytes_per_line != 0) {
    if (cc % sp->bytes_per_line != 0) {
        // ... rest of your code ...
    }
} else {
    // Handle the case where sp->bytes_per_line is zero. 
    // You might log an error, use a default value, or take other 
    // appropriate actions depending on your program's logic.
}
