Fix clang compiler warnings on FreeBSD in erts

The following are deliberately left, as I have only a list of compiler
warnings and no system to test on:
hipe/hipe_x86_signal.c:264:5: warning: no previous prototype for function '_sigaction' [-Wmissing-prototypes]
int __SIGACTION(int signum, const struct sigaction *act, struct sigaction *oldact)
    ^
hipe/hipe_x86_signal.c:222:21: note: expanded from macro '__SIGACTION'
                    ^
1 warning generated.
sys/unix/sys_float.c:835:16: warning: declaration of 'struct exception' will not be visible outside of this function [-Wvisibility]
matherr(struct exception *exc)
               ^
sys/unix/sys_float.c:835:1: warning: no previous prototype for function 'matherr' [-Wmissing-prototypes]
matherr(struct exception *exc)
^
2 warnings generated.
drivers/unix/unix_efile.c:1504:11: warning: implicit declaration of function 'sendfile' [-Wimplicit-function-declaration]
        retval = sendfile(in_fd, out_fd, *offset, SENDFILE_CHUNK_SIZE,
                 ^
1 warning generated.

1 files changed, 2 insertions, 2 deletions

diff --git a/erts/emulator/beam/erl_bif_info.c b/erts/emulator/beam/erl_bif_info.c
index fabddffc68..3d51c17183 100755
--- a/erts/emulator/beam/erl_bif_info.c
+++ b/erts/emulator/beam/erl_bif_info.c
@@ -3286,7 +3286,7 @@ BIF_RETTYPE erts_debug_get_internal_state_1(BIF_ALIST_1)
 	else if (ERTS_IS_ATOM_STR("next_pid", BIF_ARG_1)
 		 || ERTS_IS_ATOM_STR("next_port", BIF_ARG_1)) {
 	    /* Used by node_container_SUITE (emulator) */
-	    Eterm res;
+	    Sint res;
 	    if (ERTS_IS_ATOM_STR("next_pid", BIF_ARG_1))
 		res = erts_ptab_test_next_id(&erts_proc, 0, 0);
 	    else
@@ -3644,7 +3644,7 @@ BIF_RETTYPE erts_debug_set_internal_state_2(BIF_ALIST_2)
 	    Uint next;
 
 	    if (term_to_Uint(BIF_ARG_2, &next) != 0) {
-		Eterm res;
+		Sint res;
 
 		if (ERTS_IS_ATOM_STR("next_pid", BIF_ARG_1))
 		    res = erts_ptab_test_next_id(&erts_proc, 1, next);