libbb: nonblock_safe_read->nonblock_immune_read, remove unused param of xmalloc_reads

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/mailutils/mail.c b/mailutils/mail.c
index 4495701..66c7947 100644
--- a/mailutils/mail.c
+++ b/mailutils/mail.c
@@ -172,8 +172,8 @@
 		G.user = xstrdup(bb_ask(fd, /* timeout: */ 0, "User: "));
 		G.pass = xstrdup(bb_ask(fd, /* timeout: */ 0, "Password: "));
 	} else {
-		G.user = xmalloc_reads(fd, /* pfx: */ NULL, /* maxsize: */ NULL);
-		G.pass = xmalloc_reads(fd, /* pfx: */ NULL, /* maxsize: */ NULL);
+		G.user = xmalloc_reads(fd, /* maxsize: */ NULL);
+		G.pass = xmalloc_reads(fd, /* maxsize: */ NULL);
 	}
 	if (!G.user || !*G.user || !G.pass)
 		bb_error_msg_and_die("no username or password");