Function getDefaultWidth
The width of the default-sized image (in printDefaultSizedImage)
 | 
		$size = NULL | 
		the image for which the size is desired. NULL means the current image | 
 | 
		$image = NULL | 
		
			integer
		 | 
		int | 
The width of the default-sized image (in printDefaultSizedImage)
 | 
		$size = NULL | 
		the image for which the size is desired. NULL means the current image | 
 | 
		$image = NULL | 
		
			integer
		 | 
		int |