Fix an issue where parameter parsing could lead to an exception

OpenSim/Server/Base/ServerUtils.cs

@@ -227,8 +227,9 @@ namespace OpenSim.Server.Base
             // The path for a dynamic plugin will contain ":" on Windows
             string[] parts = dllName.Split (new char[] {':'});
 
-            if (parts [0].Length > 1)
+            if (parts.Length < 3)
             {
+                // Linux. There will be ':' but the one we're looking for
                 dllName = parts [0];
                 if (parts.Length > 1)
                     className = parts[1];