JPSSnagg

nagg_get_granules.c
    The geofile member of the granule structure was always printed (sometimes incorrectly) as (null).  This checkin fixes that problem, and uses the stringval macro to print "(null)" for null instead of "".
test/testnagg.sh
    Add a simple test with --debug to print the granules and check the output.
test/testfiles/somps_debug.txt
    Output file for the test.  Contains "long option debug found" and relative path to input files which will potentially be incorrect. 

Tested jam & koala, gcc & icc.