Fix bug where using PRIM_LINK_TARGET with only two remaining list items (e.g. link number then PRIM_ROTATION) would not return the parameter

Extended regression test for this case

2 files changed, 16 insertions, 2 deletions

diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
index bd451a5..975bf2d 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
@@ -8202,7 +8202,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
                 else
                     remaining = GetAgentParams((ScenePresence)entity, rules, ref result);
 
-                if (remaining == null || remaining.Length <= 2)
+                if (remaining == null || remaining.Length < 2)
                     return result;
 
                 int linknumber = remaining.GetLSLIntegerItem(0);
@@ -8786,7 +8786,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
                     case (int)ScriptBaseClass.PRIM_LINK_TARGET:
 
                         // TODO: Should be issuing a runtime script warning in this case.
-                        if (remain < 3)
+                        if (remain < 2)
                             return null;
 
                         return rules.GetSublist(idx, -1);
diff --git a/OpenSim/Region/ScriptEngine/Shared/Tests/LSL_ApiObjectTests.cs b/OpenSim/Region/ScriptEngine/Shared/Tests/LSL_ApiObjectTests.cs
index ff87cc1..ed61dc0 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Tests/LSL_ApiObjectTests.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Tests/LSL_ApiObjectTests.cs
@@ -100,6 +100,20 @@ namespace OpenSim.Region.ScriptEngine.Shared.Tests
                 Assert.That(resList.Length, Is.EqualTo(1));
             }
 
+            // Check 2 prim case
+            {
+                LSL_List resList 
+                    = apiGrp1.llGetLinkPrimitiveParams(
+                        1, 
+                        new LSL_List(
+                            new LSL_Integer(ScriptBaseClass.PRIM_ROTATION), 
+                            new LSL_Integer(ScriptBaseClass.PRIM_LINK_TARGET),
+                            new LSL_Integer(2),
+                            new LSL_Integer(ScriptBaseClass.PRIM_ROTATION)));
+
+                Assert.That(resList.Length, Is.EqualTo(2));
+            }
+
             // Check invalid parameters are ignored
             {
                 LSL_List resList