valgrind reports in t-test

[Ben Pfaff]

I'm seeing the following reports from valgrind for t-test:

==31844== Use of uninitialised value of size 8
==31844==    at 0x8070AA8: compare_group_binary (t-test.q:1941)
==31844==    by 0x8098002: hsh_find (hash.c:393)
==31844==    by 0x80705B1: group_calc (t-test.q:1786)
==31844==    by 0x8070A0B: calculate (t-test.q:1896)
==31844==    by 0x80C314F: multipass_split_output (vfm.c:967)
==31844==    by 0x80C3057: multipass_procedure_with_splits (vfm.c:930)
==31844==    by 0x806BFDA: cmd_t_test (t-test.q:335)
==31844==    by 0x807CA06: cmd_parse (command.c:253)
==31844==    by 0x809D19B: execute_command (main.c:134)
==31844==    by 0x809D14C: parse_script (main.c:104)
==31844==    by 0x809D0E8: main (main.c:91)
==31844== 
==31844== Use of uninitialised value of size 8
==31844==    at 0x8070AA8: compare_group_binary (t-test.q:1941)
==31844==    by 0x8098002: hsh_find (hash.c:393)
==31844==    by 0x809BFE1: levene_calc (levene.c:223)
==31844==    by 0x809BD9B: levene (levene.c:118)
==31844==    by 0x8070A72: calculate (t-test.q:1901)
==31844==    by 0x80C314F: multipass_split_output (vfm.c:967)
==31844==    by 0x80C3057: multipass_procedure_with_splits (vfm.c:930)
==31844==    by 0x806BFDA: cmd_t_test (t-test.q:335)
==31844==    by 0x807CA06: cmd_parse (command.c:253)
==31844==    by 0x809D19B: execute_command (main.c:134)
==31844==    by 0x809D14C: parse_script (main.c:104)
==31844==    by 0x809D0E8: main (main.c:91)
==31844== 
==31844== Use of uninitialised value of size 8
==31844==    at 0x8070AA8: compare_group_binary (t-test.q:1941)
==31844==    by 0x8098002: hsh_find (hash.c:393)
==31844==    by 0x809C27F: levene2_calc (levene.c:328)
==31844==    by 0x809BDFB: levene (levene.c:128)
==31844==    by 0x8070A72: calculate (t-test.q:1901)
==31844==    by 0x80C314F: multipass_split_output (vfm.c:967)
==31844==    by 0x80C3057: multipass_procedure_with_splits (vfm.c:930)
==31844==    by 0x806BFDA: cmd_t_test (t-test.q:335)
==31844==    by 0x807CA06: cmd_parse (command.c:253)
==31844==    by 0x809D19B: execute_command (main.c:134)
==31844==    by 0x809D14C: parse_script (main.c:104)
==31844==    by 0x809D0E8: main (main.c:91)
PASS: bugs/t-test-alpha.sh

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"Ho ho ho. I _so_ enjoy making a fool out of myself."
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