FUNCTION chars2str, char_vec

; Description: This function creates a string from a vector of characters/strings.
;
; Input Parameters:
;
;   char_vec - STRING VECTOR - A vector containing a set of strings.
;
; Return Value:
;
;   The function returns a STRING constructed by concatenating the strings stored 
;   in the parameter "char_vec". The concatenation order follows that of the 
;   elements in the string vector "char_vec".
;
; Author: Dan Bramich (dan.bramich@hotmail.co.uk)
;
; History:
;
;   14/01/2009 - Module created (dmb)

;If "char_vec" is not a vector of data of STRING type, then return an empty string

;Concatenate the string elements stored in "char_vec" to create the output string

;Return the output string