Add appcontype header to WIN32 sample application.

Resolves Visual Studio warnings due to missing CloseAllConnections()
declaration. The POSIX and MINGW ports already include this header; it
was missing only from the WIN32 port.

source/src/ports/WIN32/sample_application/sampleapplication.c

@@ -9,6 +9,7 @@
 
 #include "trace.h"
 #include "opener_api.h"
+#include "appcontype.h"
 #include "ciptcpipinterface.h"
 #include "cipqos.h"
 #include "nvdata.h"