Fixed: (Cardigann) Allow empty inputs for login.method `form`/`post`

src/NzbDrone.Core/Indexers/Definitions/Cardigann/CardigannRequestGenerator.cs

@@ -203,11 +203,14 @@ namespace NzbDrone.Core.Indexers.Definitions.Cardigann
             {
                 var pairs = new Dictionary<string, string>();
 
+                if (login.Inputs != null && login.Inputs.Any())
+                {
                     foreach (var input in login.Inputs)
                     {
                         var value = ApplyGoTemplateText(input.Value);
                         pairs.Add(input.Key, value);
                     }
+                }
 
                 var loginUrl = ResolvePath(login.Path).ToString();
 
@@ -302,6 +305,8 @@ namespace NzbDrone.Core.Indexers.Definitions.Cardigann
                     pairs[name] = value;
                 }
 
+                if (login.Inputs != null && login.Inputs.Any())
+                {
                     foreach (var input in login.Inputs)
                     {
                         var value = ApplyGoTemplateText(input.Value);
@@ -319,6 +324,7 @@ namespace NzbDrone.Core.Indexers.Definitions.Cardigann
 
                         pairs[inputKey] = value;
                     }
+                }
 
                 // selector inputs
                 if (login.Selectorinputs != null)