picloud multithread fix

libs/main/cloud/picloudtcp.h

@@ -25,6 +25,7 @@
 
 #include "pip_cloud_export.h"
 #include "pistring.h"
+#include "pimutex.h"
 
 
 class PIEthernet;
@@ -86,6 +87,8 @@ private:
 	PIByteArray suuid;
 	PIString server_name;
 	PIStreamPacker * streampacker;
+	PIMutex mutex_send;
+
 };
 
 }