Fixed function parameter type not setting properly when unbound

Upsilon/Binder/VariableSymbols/FunctionParameterSymbol.cs

@@ -9,7 +9,7 @@ namespace Upsilon.Binder.VariableSymbols
 
         public FunctionParameterSymbol(string name, Type type) : base(name, type, true)
         {
-
+            _type = type;
         }
 
         public FunctionParameterSymbol(string name, BoundTypeDefinition type) : base(name, type.ScriptType, true)

Upsilon/Binder/VariableSymbols/VariableSymbol.cs

@@ -11,7 +11,7 @@ namespace Upsilon.Binder.VariableSymbols
             Name = name;
         }
 
-        public virtual Type Type { get; set; }
+        public virtual Type Type { get; set; } = Type.Unknown;
         public bool Local { get; }
         public string Name { get; }
         public string[] CommentValue { get; set; }