scroll turned off sync for xt

scroll turned off sync for xt
	modified:   16.exe
	modified:   16.map
	modified:   bakapi.map
	modified:   exmmtest.map
	modified:   fmemtest.map
	modified:   fontgfx.map
	modified:   inputest.map
	modified:   maptest.map
	modified:   palettec.map
	modified:   pcxtest.map
	modified:   scroll.exe
	modified:   scroll.map
	modified:   src/lib/scroll16.c
	modified:   src/lib/scroll16.h
	modified:   test.map
	modified:   test2.map
	modified:   vgmtest.map