hostid: improve extremely unreadable parts

*: remove checks of sigaction and sigprocmask results
 in cases where they clearly can't fail:
 sigaction(known_good_sig)
 sigprocmask(known_good_how)

    text           data     bss     dec     hex filename
-    393              4       0     397     18d libc/pwd_grp/lckpwdf.o
+    382              4       0     386     182 libc/pwd_grp/lckpwdf.o
-     56              0       0      56      38 libc/signal/sigblock.o
+     44              0       0      44      2c libc/signal/sigblock.o
-    211              0       0     211      d3 libc/signal/sigset.o
+    202              0       0     202      ca libc/signal/sigset.o
-     56              0       0      56      38 libc/signal/sigsetmask.o
+     44              0       0      44      2c libc/signal/sigsetmask.o
-    309              0       0     309     135 libc/unistd/sleep.o
+    256              0       0     256     100 libc/unistd/sleep.o

1 files changed, 1 insertions, 1 deletions

diff --git a/libc/stdlib/abort.c b/libc/stdlib/abort.c
index 9f0fe54b8..fcf90187c 100644
--- a/libc/stdlib/abort.c
+++ b/libc/stdlib/abort.c
@@ -62,7 +62,7 @@ void abort(void)
 	/* Unmask SIGABRT to be sure we can get it */
 	__sigemptyset(&sigs);
 	__sigaddset(&sigs, SIGABRT);
-	sigprocmask(SIG_UNBLOCK, &sigs, (sigset_t *) NULL);
+	sigprocmask(SIG_UNBLOCK, &sigs, NULL);
 
 	while (1) {
 		/* Try to suicide with a SIGABRT */