commented out line 833 in main pde that was causing compile error, as per this report:

http://diydrones.com/forum/topics/2027-prolems-compiling-solved?xg_source=activity

git-svn-id: https://arducopter.googlecode.com/svn/trunk@2679 f9c3cf11-9bcb-44bc-f272-b75c42450872

ArduCopterMega/ArduCopterMega.pde

@@ -830,7 +830,7 @@ void slow_loop()
 			loop_step = 6;
 			slow_loopCounter++;
 			superslow_loopCounter++;
-			Serial.printf("sc: %4.4f \n", imu._sensor_compensation(0,50));
+//			Serial.printf("sc: %4.4f \n", imu._sensor_compensation(0,50));
 
 			if(superslow_loopCounter > 800){ // every 4 minutes
 				#if HIL_MODE != HIL_MODE_ATTITUDE