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
fix windows build

seems this was caused by 8f7a1111abb35bbb25daf6ace2add902f98361fc

Change-Id: I4e4b01de4f581134297b1c01220596ebd549b3d1
whitespace for include statements

Change-Id: I76bd0ef07a2fa134e948724cecdf539ffe6ccb8a