[Konstantinos]

pawn Код:

#if !defined isnull
    #define isnull(%1) \
                ((!(%1[0])) || (((%1[0]) == '\1') && (!(%1[1]))))
#endif

pawn Код:

// OnDialogResponse -> case DIALOG_NAME:
if (!isnull(inputtext)) SetPlayerName(playerid, inputtext);
else return ShowPlayerDialog(playerid, DIALOG_NAME, DIALOG_STYLE_INPUT,""COL_WHITE"Name Change",""COL_WHITE"Type in another name to play with. \nFirstname_Lastname","Change","No!");