twain: Update twain to version 2.3
twain: Update twain to version 2.3

Includes the mingw fixes from
dc6c7e844a02a59133e96553000666be87b1a74e

See original file changes at
http://sourceforge.net/p/twain-dsm/code/127#diff-2

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core