Remove unnecessary whitespace


git-svn-id: svn://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1076 632fc199-4ca6-4c93-a231-07263d6284db
Back-port code from jpeg-8 that removes unpopulated (and unneeded) tables for AC and DC coefficients when generating progressive JPEG files with arithmetic coding.  This should make such files bitwise compatible with jpeg-8, barring any other mathematical differences listed in README-turbo.txt.  Add regression tests for progressive+arithmetic JPEG files.


git-svn-id: svn://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1079 632fc199-4ca6-4c93-a231-07263d6284db