* use Tai_symbol.Create_global() when emitting a global symbol for an
    abstract method wrapper (tai_symbol.create() currently overrides the
    symbol type from global to local; will fix in next commit)
  * only generate global abstract method wrappers for the class in which
    the abstract method is declared to prevent duplicate symbol errors
    after the above fix


git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@25265 3ad0048d-3df7-0310-abae-a5850022a9f2
  * give an internalerror when we try to change the type of an asmsymbol from
    anything but none (= undefined) to local


git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@25266 3ad0048d-3df7-0310-abae-a5850022a9f2