Agent can try to move out of bounds, throwing an ArrayIndexOutOfBoundsException

[QuantumMatters]

burlap/src/main/java/burlap/domain/singleagent/blockdude/BlockDudeModel.java

Line 138 in cc3b09d

int nx = ax+dir;

Because dir can be +1 and ax can be the map.length - 1, the agent can try to move outside the bounds of the map array.

To reproduce, run this test with getLevel1 or getLevel2 instead of getLevel3:

burlap/src/test/java/burlap/testing/TestBlockDude.java

Line 40 in cc3b09d

return BlockDudeLevelConstructor.getLevel3(domain);

[yangluo0901]

any solutions to it instead of modified the source code by my self