Don't crash when trying to stop inactive script profile timer.

Author: nitrocaster

src/xrScriptEngine/ScriptEngineScript.cpp

@@ -117,7 +117,8 @@ struct profile_timer_script
 
     void stop()
     {
-        THROW(m_recurse_mark);
+        if (!m_recurse_mark)
+            return;
         m_recurse_mark--;
         if (m_recurse_mark)
             return;