Minor tweak to improve code readability


git-svn-id: svn://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1300 632fc199-4ca6-4c93-a231-07263d6284db
SIMD-accelerated h2v2 smooth downsampling routine for MIPS DSPr2


git-svn-id: svn://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1301 632fc199-4ca6-4c93-a231-07263d6284db