hw/pcnet.c: windows compile fix

(Eduardo Felipe)

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5140 c046a42c-6fe2-441c-8c8c-71466251a162
diff --git a/hw/pcnet.c b/hw/pcnet.c
index 9970348..3cd6031 100644
--- a/hw/pcnet.c
+++ b/hw/pcnet.c
@@ -35,7 +35,11 @@
  * http://www.ibiblio.org/pub/historic-linux/early-ports/Sparc/NCR/NCR92C990.txt
  */
 
+#ifdef _WIN32
+#include <winsock2.h>
+#else
 #include <netinet/in.h>
+#endif
 
 #include "hw.h"
 #include "pci.h"