Assign correct values in update_setup().
Assign correct values in update_setup().

Values for SetUp and FEN headers were reversed.

Fixes #43.

mattyhead/chess.js,ornicar/chess.js,akshayverma2804/chess.js,Assios/chess.js,r9k/chess.js,ornicar/chess.js,jeffthemaximum/chess.js,linrock/chess.js,jhlywa/chess.js