Apply standards for whole-file conditions

Marlin/vector_3.cpp

@@ -38,11 +38,14 @@
   License along with this library; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
-#include <math.h>
-#include "Marlin.h"
+
+#include "MarlinConfig.h"
 
 #if HAS_ABL
+
 #include "vector_3.h"
+#include "serial.h"
+#include <math.h>
 
 vector_3::vector_3() : x(0), y(0), z(0) { }