Removed static variables and properly initialised in setup, which

should allow this protocol to work for more than one race.
Back-ported to master.

src/network/protocols/kart_update_protocol.cpp

@@ -10,14 +10,6 @@
 
 KartUpdateProtocol::KartUpdateProtocol() : Protocol(PROTOCOL_KART_UPDATE)
 {
-    // Allocate arrays to store one position and rotation for each kart
-    // (which is the update information from the server to the client).
-    m_next_positions.resize(World::getWorld()->getNumKarts());
-    m_next_quaternions.resize(World::getWorld()->getNumKarts());
-
-    // This flag keeps track if valid data for an update is in
-    // the arrays
-    m_was_updated = false;
 }   // KartUpdateProtocol
 
 // ----------------------------------------------------------------------------
@@ -28,6 +20,16 @@ KartUpdateProtocol::~KartUpdateProtocol()
 // ----------------------------------------------------------------------------
 void KartUpdateProtocol::setup()
 {
+    // Allocate arrays to store one position and rotation for each kart
+    // (which is the update information from the server to the client).
+    m_next_positions.resize(World::getWorld()->getNumKarts());
+    m_next_quaternions.resize(World::getWorld()->getNumKarts());
+
+    // This flag keeps track if valid data for an update is in
+    // the arrays
+    m_was_updated = false;
+
+    m_previous_time = 0;
 }   // setup
 
 // ----------------------------------------------------------------------------
@@ -73,11 +75,11 @@ void KartUpdateProtocol::update(float dt)
 {
     if (!World::getWorld())
         return;
-    static double time = 0;
+
     double current_time = StkTime::getRealTime();
-    if (current_time > time + 0.1) // 10 updates per second
+    if (current_time > m_previous_time + 0.1) // 10 updates per second
     {
-        time = current_time;
+        m_previous_time = current_time;
         if (NetworkConfig::get()->isServer())
         {
             World *world = World::getWorld();

src/network/protocols/kart_update_protocol.hpp

@@ -25,6 +25,10 @@ private:
     /** True if a new update for the kart positions was received. */
     bool m_was_updated;
 
+    /** Time the last kart update was sent. Used to send updates with
+     * a fixed frequency. */
+    double m_previous_time;
+
 public:
              KartUpdateProtocol();
     virtual ~KartUpdateProtocol();