m68k: fix references like <symbol>(An) to parse properly in the assembler reader

git-svn-id: trunk@47356 -

compiler/m68k/ra68kmot.pas

@@ -1522,6 +1522,8 @@ const
                         end
                        else
                         begin
+                          if actasmtoken = AS_LPAREN then
+                            oper.initref;
                           if not oper.SetupVar(expr,false) then
                             begin
                               { not a variable, check special variables.. }