Do not call ret_in_param of the current parameter manager when parsing a generic method/function. This fixes Mantis #21921.

* pparautl.pas, insert_funcret_para:
    assume that the result in a generic function/method can not be passed in a param
* pparautl.pas, insert_funcret_local: 
    don't call ret_in_param, but create the symbol as we need a valid funcretsym
* pstatmnt.pas, assembler_block:
    don't modify the framepointer for a generic method/function
* rautils.pas, TOperand.SetupResult:
    don't assume that we can't use the result for a generic function/method

git-svn-id: trunk@21608 -