claw button

 //global
unsigned short pos = 0;

//in loop
if(digitalRead(btnClawIncrementPin))
{
    pos += ((pos == 180) ? 0 : 1); //I love the ternary operator. No forking here!
    clawServo.write(pos);
}
else if(digitalRead(btnClawDecrementPin))
{
    pos -= ((pos == 0) ? 0 : 1);
    clawServo.write(pos);
}