void drawBoard(GtkWidget* table, GtkWidget** entries[][9])
{
    for(last_i=1; last_i<10; last_i++)
    {
        for(last_j=1; last_j<10; last_j++)
        {
            addField(entries[last_i][last_j],table);
            gtk_entry_set_width_chars(entries[last_i][last_j], 2); //<-- w tym miejscu program się wysypuje
        }

    }

}
void addField(GtkWidget* field, GtkWidget *table)
{
    field = gtk_entry_new_with_max_length(1);
    gtk_table_attach_defaults (GTK_TABLE (table), field, last_j-1, last_j, last_i-1, last_i);
    //reszta funkcji

}
int main(){

GtkWidget *entries[9][9];
drawBoard(table, entries);
}