Make Windows cross compile again

But this is broken as the utf8/utf16 conversions in windows.c are gone
without glib.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

dive.h

@@ -5,7 +5,19 @@
 #include <stdint.h>
 #include <time.h>
 #include <math.h>
-#include <sys/param.h>
+
+/* Windows has no MIN/MAX macros - so let's just roll our own */
+#define MIN(x, y) ({                \
+    typeof(x) _min1 = (x);          \
+    typeof(y) _min2 = (y);          \
+    (void) (&_min1 == &_min2);      \
+    _min1 < _min2 ? _min1 : _min2; })
+
+#define MAX(x, y) ({                \
+    typeof(x) _max1 = (x);          \
+    typeof(y) _max2 = (y);          \
+    (void) (&_max1 == &_max2);      \
+    _max1 > _max2 ? _max1 : _max2; })
 
 #include <libxml/tree.h>
 #include <libxslt/transform.h>