Minor - P4 A strict build with gcc version 7.1.1 20170622 emits errors such as:
In file included from ../../../src/include/wt_internal.h:374:0,
from ../../../test/utility/test_util.h:28,
from ../../../test/packing/intpack-test.c:29:
../../../test/packing/intpack-test.c: In function 'main':
../../../src/include/intpack.i:153:18: error: array subscript is above array bounds [-Werror=array-bounds]
x = (x << 8) | *p++;
^~~~