fixes for windows

mc_buffer.cpp

@@ -87,11 +87,11 @@ void Buffer::setData(const void* data, int bytes) {
 }
 
 const void* Buffer::data() const {
-    return &data_[0];
+    return bytes() == 0 ? NULL : &data_[0];
 }
 
 void* Buffer::data() {
-    return &data_[0];
+    return bytes() == 0 ? NULL : &data_[0];
 }
 
 int Buffer::bytes() const {

mc_socket.cpp

@@ -29,16 +29,36 @@
 namespace metacall {
 
 
+namespace {
+
+
 //
 // Constants
 //
 
-namespace {
-
-
 const int SOCKET_INVALID = -1;
 
 
+//
+// Winsock
+//
+
+#ifdef _WIN32
+
+struct WsaScope {
+    WsaScope() {
+        WSAData data; 
+        WSAStartup(MAKEWORD(2, 2), &data); 
+    }
+
+    ~WsaScope() {
+        WSACleanup();
+    }
+} wsa;
+
+#endif
+
+
 }
 
 

metacall.hpp

@@ -31,6 +31,7 @@
 
 #ifdef _WIN32
     #pragma comment(lib, "ws2_32.lib")
+    #define NOMINMAX
     #include <ws2tcpip.h>
 #else
     #include <sys/socket.h>