JPSSnagg

src/nagg_get_granules.c:
Fixed bug: get_granules() did not check for maximum number of granules limit,
thus ended up in seg. fault when the limit was exceeded. Fixed by adding
the checking code and error messages.

src/nagg.h:
raise the limit of number of granules managed (NAGG_Granule_info_max)
to 10,000.

Tested: koala.