GraphicsMagick file globbing fixes

I have just committed many fixes to the ExpandFilenames function. It
is perhaps not well known that a file specification like
"JPEG:~/myfiles/*.jpg" (quotes required to avoid expansion by the
shell) is supported via internal file globbing in GraphicsMagick.
This is handy in order to avoid shell argument length limitations.

The committed fixes are:

	* magick/utility.c (ExpandFilenames): Handle tilde expansion
	properly. Handle relative glob specifications. Skip over "*"
	argument to +profile properly. Don't expand VID: specifications
	since the VID: coder will execute ExpandFilenames() later. Apply
	format specifier prefix to globbed file names. Fix double frees
	and rationalize memory management by always copying to a new
	vector.

Note that directory path globbing is not yet supported.  Only filename
level globbing is currently supported.

If you are using CVS to access GraphicsMagick, I would appreciate it
if you would test the built-in globbing to make sure that I have not
introduced any negative side-effects.

Note that current development for 1.0 is on the GraphicsMagick-1_0
branch, so you must either do a "cvs update -r GraphicsMagick-1_0" to
transition to that branch, or add "-r GraphicsMagick-1_0" to the
options when you check out the sources.  If you don't do that, you
will get sources from the trunk, which is currently not being updated.

Bob
======================================
Bob Friesenhahn
[email protected]
http://www.simplesystems.org/users/bfriesen



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