Fix XPM termination with margin other than 1 / Solves issue #193 and #188

[PCDbeeip]

process bottom margin like top margine by adding empty row at the end of QR data and always terminate the block even if there is no magin.

Note : the last ',' at the end of the table seems to be valid with every C compiler or every image processor i checked.

Solves issue #193 and #188