implement llClearPrimMedia()

untested

OpenSim/Region/CoreModules/World/Media/Moap/MoapModule.cs

@@ -129,6 +129,11 @@ namespace OpenSim.Region.CoreModules.Media.Moap
             part.ScheduleFullUpdate();
         }
         
+        public void ClearMediaEntry(SceneObjectPart part, int face)
+        {
+            SetMediaEntry(part, face, null);
+        }
+        
         /// <summary>
         /// Sets or gets per face media textures.
         /// </summary>

OpenSim/Region/Framework/Interfaces/IMoapModule.cs

@@ -53,5 +53,15 @@ namespace OpenSim.Region.Framework.Interfaces
         /// <param name="face"></param>
         /// <param name="me"></param>
         void SetMediaEntry(SceneObjectPart part, int face, MediaEntry me);
+        
+        /// <summary>
+        /// Clear the media entry for a given prim face.
+        /// </summary>
+        /// 
+        /// This is the equivalent of setting a media entry of null
+        /// 
+        /// <param name="part"></param>
+        /// <param name="face">/param>
+        void ClearMediaEntry(SceneObjectPart part, int face);
     }        
 }

OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs

@@ -8023,6 +8023,26 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
             return ScriptBaseClass.LSL_STATUS_OK;
         }
         
+        public LSL_Integer llClearPrimMedia(LSL_Integer face)
+        {
+            m_host.AddScriptLPS(1);
+            ScriptSleep(1000);
+
+            // LSL Spec http://wiki.secondlife.com/wiki/LlClearPrimMedia says to fail silently if face is invalid
+            // Assuming silently fail means sending back LSL_STATUS_OK.  Ideally, need to check this.
+            // FIXME: Don't perform the media check directly
+            if (face < 0 || face > m_host.GetNumberOfSides() - 1)
+                return ScriptBaseClass.LSL_STATUS_OK;
+            
+            IMoapModule module = m_ScriptEngine.World.RequestModuleInterface<IMoapModule>();
+            if (null == module)
+                throw new Exception("Media on a prim functions not available");            
+            
+            module.ClearMediaEntry(m_host, face);
+            
+            return ScriptBaseClass.LSL_STATUS_OK;
+        }
+        
         //  <remarks>
         //  <para>
         //  The .NET definition of base 64 is: