hdf5_msb

[svn-r23984] Merged 2 23932 from reduced_warnings branch:
Changes applied to eliminate several compiler warnings in the test directory in
files:
dt_arith.c
filter_fail.c
big.c
dynlib2.c
dynlib3.c
Also an HDassert(0 && "Unknown type"); statement was added to all 29 combination
s of
case OTHER:
default:
See crucible review HDF5-145 for more details.

Tested with h5committest.