The rebar is the parent of the ruler, not the top level window, so
GetDlgItem was returning NULL when the window is resized.  As a result the
screen was being invalidated and repainted instead of the ruler.

On Cygwin we want to use Wine's msvcrt, unlike on Mingw.

They only pollute output making it harder to find useful informations.

krnl386: Defined the SMapLS/UnMapLS_IP_EBP functions explicitly to make life easier for winapi_check.