Fix build error in Debug mode related to COpenNI2_RGBD360
Fix build error in Debug mode related to COpenNI2_RGBD360

Bug: Non existing mode vOpenDevices.empty was being used

Solution: Copied line from COpenNI2Sensor.cpp by Kenzaburo Miyawaki
MRPT/mrpt,MRPT/mrpt,MRPT/mrpt,MRPT/mrpt,MRPT/mrpt