Code cleanup at function TAOptBase.RegInInstruction

compiler/aoptbase.pas has

  Function TAOptBase.RegInInstruction(Reg: TRegister; p1: tai): Boolean;
    Var
      Count: longint;
    Begin
      result:=false;
      if p1.typ<>ait_instruction then
        exit;
      for Count:=0 to TInstr(p1).ops-1 do
        if RegInOp(Reg, TInstr(p1).oper[Count]^) then
          exit(true);
      result:=false;
    End;

The presence of the last "result:=false;" is useless because false is already assigned at the beginning of the function. The following patch removes it. patch.diff