Fix source location for 'Could not resolve type' error

Author: C0nquistadore

src/Dibix.Sdk.CodeGeneration/Registration/ContractDefinitionSchemaProvider.cs

@@ -151,7 +151,7 @@ TypeReference ResolveType()
                         bool isEnumerable = typeName.EndsWith("*", StringComparison.Ordinal);
                         typeName = typeName.TrimEnd('*');
 
-                        SourceLocation location = value.GetSourceInfo();
+                        SourceLocation location = typeNameValue.GetSourceInfo();
                         TypeReference type = _typeResolver.ResolveType(typeName, relativeNamespace, location, isEnumerable);
                         return type;
                     }