10138 smatch fixes for usr/src/cmd/sgs

@@ -27,10 +27,14 @@
 /*
  *      Copyright (c) 1988 AT&T
  *        All Rights Reserved
  */
 
+/*
+ * Copyright (c) 2018, Joyent, Inc.
+ */
+
 #include <memory.h>
 #include <malloc.h>
 #include <limits.h>
 
 #include <sgs.h>

@@ -741,13 +745,10 @@
 {
         size_t          sz;
         unsigned        u;
         Ehdr            *eh = elf->ed_ehdr;
 
-        if (elf == 0)
-                return (-1);
-
         ELFWLOCK(elf)
         switch (cmd) {
         default:
                 _elf_seterr(EREQ_UPDATE, 0);
                 ELFUNLOCK(elf)