Thank you kindly, Nlin for a patch that:

Attached patch adds detection of AGENT_WALKING 
status to LSL function llGetAgentInfo() 

2 files changed, 7 insertions, 1 deletions

diff --git a/OpenSim/Region/Environment/Scenes/ScenePresence.cs b/OpenSim/Region/Environment/Scenes/ScenePresence.cs
index 2caeb14..4346b08 100644
--- a/OpenSim/Region/Environment/Scenes/ScenePresence.cs
+++ b/OpenSim/Region/Environment/Scenes/ScenePresence.cs
@@ -1478,7 +1478,7 @@ namespace OpenSim.Region.Environment.Scenes
         /// <summary>
         /// This method determines the proper movement related animation
         /// </summary>
-        protected string GetMovementAnimation()
+        public string GetMovementAnimation()
         {
             if (m_movementflag != 0)
             {
diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
index 4c4d173..9745ae6 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
@@ -4671,6 +4671,12 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
                 flags |= ScriptBaseClass.AGENT_TYPING;
             }
 
+            string agentMovementAnimation = agent.GetMovementAnimation();
+            if (agentMovementAnimation == "WALK" || agentMovementAnimation == "CROUCHWALK")  
+            {
+                flags |= ScriptBaseClass.AGENT_WALKING;
+            }
+
             //NotImplemented("llGetAgentInfo");
 
             return flags;