10130 smatch fixes for usr/src/cmd/fm

@@ -20,10 +20,15 @@
  */
 
 /*
  * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
  */
+
+/*
+ * Copyright (c) 2018, Joyent, Inc.
+ */
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <alloca.h>
 #include <errno.h>

@@ -809,11 +814,11 @@
                         case 'R':
                                 nhdl->nh_rootdir = strdup(optarg);
                                 break;
                         default:
                                 free(nhdl);
-                                return (usage(nhdl->nh_pname));
+                                return (usage(argv[0]));
                         }
                 }
         }
 
         /*