keep busy jittering wave fix

strategies/SoftwareBitBang/SoftwareBitBang.h

@@ -141,6 +141,7 @@ class SoftwareBitBang {
        digitalWriteFast(_input_pin, LOW);
        response = receive_byte();
        if(response == FAIL) {
          pinModeFast(_output_pin, OUTPUT);
          digitalWriteFast(_output_pin, HIGH);
          delayMicroseconds(SWBB_BIT_WIDTH / 4);
          pullDownFast(_output_pin);