Update civetweb.c
Update civetweb.c

Update the defines to compile clean in Windows.  The last edit were not correct.
GerHobbelt/civet-webserver,GerHobbelt/civet-webserver,GerHobbelt/civet-webserver,GerHobbelt/civet-webserver,GerHobbelt/civet-webserver,GerHobbelt/civet-webserver