Merge pull request #49 from fluffy/fixCompile

Fix compile warning and bug in getPoint

src/Command.h

@@ -34,7 +34,7 @@ enum CommandCodeEnum
   F83 = 183
 };
 
-#define NULL 0
+//#define NULL 0
 
 class Command {
 	CommandCodeEnum codeEnum;

src/CurrentState.cpp

@@ -43,7 +43,7 @@ long CurrentState::getZ() {
 }
 
 long* CurrentState::getPoint() {
-	long currentPoint[3] = {x, y, z};
+	static long currentPoint[3] = {x, y, z};
 	return currentPoint;
 }