10079 smatch Makefile changes for usr/src/lib

*** 20,29 ****
--- 20,30 ----
  #
  #
  # Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  # Use is subject to license terms.
  #
+ # Copyright (c) 2018, Joyent, Inc.
  
  LIBRARY =               libpapi.a
  VERS =                  .0
  OBJECTS = job.o nss.o printer.o psm.o service.o
  
*** 46,55 ****
--- 47,58 ----
  CPPFLAGS +=     -DNSS_SOLARIS
  LDLIBS +=       -lc
  
  CERRWARN +=     -_gcc=-Wno-unused-variable
  
+ SMOFF += all_func_returns
+ 
  .KEEP_STATE:
  
  all:    $(LIBS)
  
  lint:   lintcheck