10080 smatch Makefile changes for usr/src/cmd

*** 20,29 ****
--- 20,30 ----
  #
  #
  # Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  # Use is subject to license terms.
  #
+ # Copyright (c) 2018, Joyent, Inc.
  
  PROG= tnd
  OBJS= tnd.o
  
  SRCS= $(OBJS:.o=.c)
*** 45,54 ****
--- 46,57 ----
  CPPFLAGS += -DDEBUG
  
  CERRWARN += -_gcc=-Wno-unused-value
  CERRWARN += -_gcc=-Wno-parentheses
  
+ SMOFF += no_if_block
+ 
  .KEEP_STATE:
  
  all:    $(PROG)
  
  install:        all $(ROOTTSOLPROG) $(ROOTMANIFEST) $(ROOTSVCMETHOD) \