Update InfoTemplate.cpp



I'm one of the applicants who is interested in applying for GSoC 2014 for your organization and I was going through the codes and the toolkit and discovered a bug.

When making an informative app, I found that when removing the last item from the item list the program crashes.

I have figured out that the slot
```C++
void InfoTemplate::on_itemList_selected()
{
        textEdit->setPlainText(iDescriptionList.at(itemList->currentRow()));
}
```
gets called after the last item is deleted from the (QListWidget) ItemList which then tries to access a null pointer (deleted item)

I solved it by adding a check for null pointer at the slot.
```C++
void InfoTemplate::on_itemList_selected()
{
    if(itemList->currentItem() != 0)
        textEdit->setPlainText(iDescriptionList.at(itemList->currentRow()));
}
```
there was also a problem with the remove function which removes the item in the ItemList and proceeds to remove other items from other lists with the index of the "deleted item".

I think by adding a temp integer which possesses the value of the item's index before deleting it fixes the issue.
```C++
void InfoTemplate::on_removedButton_cicked()
{  
    int temp = itemList->currentRow();
    itemList->takeItem(temp);
    itemList_phone->takeItem(temp);
    iTitleList.removeAt(temp);
    iDescriptionList.removeAt(temp);
}
```
I'm looking forward to working with you in the GSoC 2014!