Somewhat different conditions for unistd.h (MinGW has it) [same update for uioport.h should be done]

git-svn-id: svn://svn.code.sf.net/p/sc2/code/trunk@1904 8092fc87-c524-0410-9efc-e669fe64eaf9

sc2/src/port.h

@@ -3,7 +3,7 @@
 
 #include "config.h"
 
-#ifdef WIN32
+#ifdef _MSC_VER
 #	include <io.h>
 #else
 #	include <unistd.h>
@@ -66,12 +66,10 @@ typedef unsigned short mode_t;
 
 // Directories
 #include <sys/stat.h>
-#ifdef WIN32
 #ifdef _MSC_VER
 #	define MKDIR(name, mode) ((void) mode, _mkdir(name))
-#	else
+#elif defined(__MINGW32__)
 #	define MKDIR(name, mode) ((void) mode, mkdir(name))
-#	endif
 #else
 #	define MKDIR mkdir
 #endif