Added ifdefs to blinkm

Marlin/BlinkM.cpp

   BlinkM.cpp - Library for controlling a BlinkM over i2c
   Created by Tim Koster, August 21 2013.
 */
+#ifdef BLINKM
+
 #if (ARDUINO >= 100)
   # include "Arduino.h"
 #else
   Wire.endTransmission();
 }
 
+#endif //BLINKM
+

Marlin/Marlin_main.cpp

 #include "language.h"
 #include "pins_arduino.h"
 
+#ifdef BLINKM
 #include "BlinkM.h"
 #include "Wire.h" 
+#endif
 
 #if NUM_SERVOS > 0
 #include "Servo.h"