* Remove most (not all) variables that were initialized but never used that
cause GCC 4.6 to generate a warning.
* Fix bug in schematic library editor best zoom calculation.
In Render, colors shown were the default colors, not the selected colors, when starting Pcbnew or Gerbview,
because colors were not updated after reading the config.
(WxWidgets 2.9.1 seems call setlocale( LC_NUMERIC, "" ) when wxConfig read doubles stored in config, but forget to back to current locale.)
Note: perhaps there are some dialogs that need this call to SetLocaleTo_Default() ).
* Minor code cleanup in pcbnew/netlist.cpp