Make internal_fork and internal_exec static

   text	   data	    bss	    dec	    hex	filename
 237917	    672	  18980	 257569	  3ee21	strace
 237845	    672	  18980	 257497	  3edd9	strace_new

* defs.h: Remove declarations of internal_fork and internal_exec.
* process.c: Remove definitions of internal_fork and internal_exec.
* syscall.c: Move them here.
(internal_syscall): Return void instead of int. We were always
returning zero, and callers weren't checking it anyway.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
3 files changed