Fixed dace detection exit issue.

NOTE: There was a change (I think Morteza has made) in getReetiFaceInfo() method in C++ code. He changed the value of Happiness in the face info structure to -2, indicating (for java) sending a "Capture" command has been faced with a problem (to make the java exit and restart). To be consistent to my other changes, I changed it in a way you can see in the file (just a value change from -2 to -4). Please just make sure where ever you were checking this value (in java), needs to be changed to the new value which is -4 (SENDING_CAPTURE_COMMAND_ERROR in C++... so you need to check if it is -4).