zdtm/ptrace_sic: set types for function arguments
zdtm/ptrace_sic: set types for function arguments

I've updated Mr Jenkins to fc22 and can't compile zdtm tests:
cc -g -O2 -Wall -Werror -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=0  -iquote ../../lib/arch/x86/include -I../../lib   ptrace_sig.c ../../lib/libzdtmtst.a   -o ptrace_sig
ptrace_sig.c: In function ‘child’:
ptrace_sig.c:33:5: error: type of ‘fd’ defaults to ‘int’ [-Werror=implicit-int]
 int child(fd)

Reported-by: Mr Jenkins
Signed-off-by: Andrew Vagin <74c05afa918858348d6db8037d82fa8124870113@openvz.org>
Signed-off-by: Pavel Emelyanov <c9a32589e048e044184536f7ac71ef92fe82df3e@parallels.com>

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