[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.

test/dynlib3.c

@@ -71,6 +71,9 @@ H5Z_filter_dynlib3(unsigned int flags, size_t cd_nelmts,
     if(cd_nelmts > 0)
         return(0);
 
+    /* Assignment to eliminate unused parameter warning. */
+    cd_values = cd_values;
+
     if(flags & H5Z_FLAG_REVERSE) { /*read*/
         ret_value = *buf_size = nbytes - SUFFIX_LEN;
     } /* end if */