8626 make pcplusmp and apix warning-free
Reviewed by: Robert Mustacchi <rm@joyent.com>
Reviewed by: Jerry Jelinek <jerry.jelinek@joyent.com>

@@ -20,10 +20,11 @@
  */
 /*
  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  * Copyright 2016 Nexenta Systems, Inc.
  * Copyright (c) 2017 by Delphix. All rights reserved.
+ * Copyright 2017 Joyent, Inc.
  */
 /*
  * Copyright (c) 2010, Intel Corporation.
  * All rights reserved.
  */

@@ -328,13 +329,13 @@
 int
 apic_probe_common(char *modname)
 {
         uint32_t mpct_addr, ebda_start = 0, base_mem_end;
         caddr_t biosdatap;
-        caddr_t mpct = 0;
+        caddr_t mpct = NULL;
         caddr_t fptr;
-        int     i, mpct_size, mapsize, retval = PSM_FAILURE;
+        int     i, mpct_size = 0, mapsize, retval = PSM_FAILURE;
         ushort_t        ebda_seg, base_mem_size;
         struct  apic_mpfps_hdr  *fpsp;
         struct  apic_mp_cnf_hdr *hdrp;
         int bypass_cpu_and_ioapics_in_mptables;
         int acpi_user_options;