blizzard of compiler warnings

[Hal Murray]

This is on a 32 bit Fedora.

[142/166] Compiling tests/libntp/vi64ops.c
In file included from ../../include/ntp_syslog.h:11:0,
                 from ../../include/ntp_stdlib.h:17,
                 from ../../tests/libntp/vi64ops.c:2:
../../tests/libntp/vi64ops.c: In function ‘TEST_vi64ops_HiLoVUI64uh_’:
../../include/ntp_types.h:55:52: warning: left shift count >= width of type 
[-Wshift-count-overflow]
 #define SET32FIRST(n,v) (n) = ((((v) & LAST32MASK) << 32) | ((n) & 
LAST32MASK))
                                                    ^
../../include/ntp_types.h:61:27: note: in expansion of macro ‘SET32FIRST’
 #define settime64hiu(n,v) SET32FIRST(n,v)
                           ^~~~~~~~~~
../../tests/libntp/vi64ops.c:16:2: note: in expansion of macro 
‘settime64hiu’
  settime64hiu(exp, 0x01234567);
  ^~~~~~~~~~~~
../../tests/libntp/vi64ops.c: In function ‘TEST_vi64ops_HiLoVUI64ul_’:
../../include/ntp_types.h:55:52: warning: left shift count >= width of type 
[-Wshift-count-overflow]
 #define SET32FIRST(n,v) (n) = ((((v) & LAST32MASK) << 32) | ((n) & 
LAST32MASK))
                                                    ^
../../include/ntp_types.h:61:27: note: in expansion of macro ‘SET32FIRST’
 #define settime64hiu(n,v) SET32FIRST(n,v)
                           ^~~~~~~~~~
../../tests/libntp/vi64ops.c:24:2: note: in expansion of macro 
‘settime64hiu’
  settime64hiu(exp, 0x01234567);
  ^~~~~~~~~~~~


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