GRIDMATRIX, MAXICODE, MICROPDF417, PDF417, QRCODE, ULTRA
DOTCODE: use pre-calculated generator poly coeffs in Reed-Solomon for
performance improvement
PDF417/MICROPDF417: use common routine pdf417_initial()
GUI: code lines <= 118, shorthand widget_obj(),
shorten calling upcean_addon_gap(), upcean_guard_descent()
various backend: var name debug -> debug_print
[backend/bmp.c:133]: (error) Memory leak: bitmap
[backend/bmp.c:126]: (error) Memory leak: bitmap
[backend/composite.c:464]: (error) Array index -1 is out of bounds.
[backend/composite.c:507]: (error) Array index -1 is out of bounds.
[backend/dmatrix.c:962]: (style) Redundant condition: i!=0. 'i==0 || (i!=0 && binary[i-1]!='b')' is equivalent to 'i==0 || binary[i-1]!='b''
[backend/raster.c:122]: (error) Memory leak: rotated_pixbuf
[backend/raster.c:506]: (error) Memory leak: pixelbuf
[frontend/main.c:273]: (error) Uninitialized variable: format_string
[frontend_qt/exportwindow.cpp:103]: (style) Array index 'j' is used before limits check.
