NAME:
	mkgif
 PURPOSE:
       make a B-W gif with a black cross in centre from the 
	array map and stores in in the file name
 CALLING SEQUENCE:
	mkgif,name,map[,map2,ct=ct,minmax=minmax]
 INPUTS:
	map: 2D image array 
 OPTIONAL INPUT PARAMETERS
	ct: number of color table to ba used (eq 3: red temp, 8:G/W linear)
		default is 0 (B/W linear)
	minmax: 2 element array
		optional user specified limits for scaling of image
		if not set the program works it out itself
 OUTPUTS:
	name: file name (.gif) to store gif into
 OPTIONAL OUTPUT PARAMETERS
	map2: if set, gets filled with the resized version with black cross
 EXAMPLE:
	mkgif,array,'image.gif'
 CALLED PROCEDURES:
	
 MODIFICATION HISTORY:
	Original by Ignas Snellen
	Oct 2000 S. Aigrain: make cross bigger if image is large

(See /home/xmmssc/soft/idl/pro/mkgifs/mkgif.pro)