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

--- a/Makefile.in
+++ b/Makefile.in
@@ -48,7 +48,7 @@
 DEFS = -DDEBUG @DEFS@ -DARPDIR=\"$(ARPDIR)\" -DPATH_SENDMAIL=\"$(SENDMAIL)\"
 
 # Standard CFLAGS
-CFLAGS = $(CCOPT) $(DEFS) $(INCLS)
+CFLAGS = $(CCOPT) $(DEFS) $(INCLS) $(CPPFLAGS)
 LDFLAGS = @LDFLAGS@
 
 # Standard LIBS
