Improve listitem validation

[NexiusTailer]

Now listitems in dialogs are validated this way:

open.mp/Server/Components/Dialogs/dialog.cpp

Lines 158 to 162 in 62a2fa9

	// If dialog type is one of the lists and list item is invalid, ignore it
	if (sendDialogResponse.ListItem < 0 && (data->style_ == DialogStyle_LIST || data->style_ == DialogStyle_TABLIST || data->style_ == DialogStyle_TABLIST_HEADERS))
	{
	return false;
	}

but it should also consider any other dialog styles (DIALOG_STYLE_MSGBOX, DIALOG_STYLE_INPUT and DIALOG_STYLE_PASSWORD) where listitem always -1 only, and any other values are inacceptable.

The ideal way of validating listitems would be remembering how much items the shown dialog actually has for a player (counting it when ShowPlayerDialog was called, as an example) and clearly check if the listitem is in the range of 0..[max listitem value] for dialogs with any tablist style; Otherwise check if the listitem is not -1 for any other dialog styles.