Description: Pass $CPPFLAGS to C compiler, too.
 Fixes lintian warning hardening-no-fortify-functions.
Author: Axel Beckert <abe@debian.org>

Index: arpwatch/Makefile.in
===================================================================
--- arpwatch.orig/Makefile.in	2015-06-13 19:39:11.774000452 +0200
+++ arpwatch/Makefile.in	2015-06-13 19:39:58.033453505 +0200
@@ -50,7 +50,7 @@
 	-DETHERCODES=\"$(ETHERCODES)\"
 
 # Standard CFLAGS
-CFLAGS = $(CCOPT) $(DEFS) $(INCLS)
+CFLAGS = $(CCOPT) $(DEFS) $(INCLS) $(CPPFLAGS)
 LDFLAGS = @LDFLAGS@
 
 # Standard LIBS
