Hello,

I happened to find the tiny bug in camera_calibration. When  
calibration data is shown on the terminal, D (distortion) just showed  
4 values even though 5 values should be shown in D as distortion  
showed 5 value. It seems to occur because the last value of distortion  
is zero.

<Sample>
D =  [-0.29496962080028677, 0.12120859315219049,  
-0.0019941265153862824, 0.0012058185627261283]

distortion
-0.294970 0.121209 -0.001994 0.001206 0.0000


I hope it will be fixed in the next version.

Best,
Soonhac