CppEditor: Fix "Add Definition" quickfix for function parameters

... whose type is a template.

Fixes: QTCREATORBUG-25560
Change-Id: I1d626f9376e8802a87ca1a28099932ccbf744d47
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/libs/cplusplus/TypePrettyPrinter.cpp

@@ -462,6 +462,7 @@ void TypePrettyPrinter::visit(Function *type)
         argumentText.showReturnTypes = true;
         argumentText.showArgumentNames = false;
         argumentText.showFunctionSignatures = true;
+        argumentText.showTemplateParameters = _overview->showTemplateParameters;
 
         _text += QLatin1Char('(');