Modify C header files to include from C++ code

mbus/mbus-tcp.h

@@ -21,6 +21,11 @@
 #include "mbus-protocol.h"
 #include "mbus-protocol-aux.h"
 
+#ifdef __cplusplus
+extern "C" {
+        #endif
+
+
 typedef struct _mbus_tcp_data
 {
     char *host;
@@ -33,6 +38,10 @@ int              mbus_tcp_send_frame(mbus_handle *handle, mbus_frame *frame);
 int              mbus_tcp_recv_frame(mbus_handle *handle, mbus_frame *frame);
 void             mbus_tcp_data_free(mbus_handle *handle);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* MBUS_TCP_H */