getline handling bug

src/Makefile

 ###############################################################################
 
 CC      := gcc
-CCFLAGS := -Wall -Werror -pedantic -O2 -I../inc
+CCFLAGS := -Wall -Werror -pedantic -O2
+#CCFLAGS := -Wall -Werror -pedantic -g 
 LDFLAGS := -lnetfilter_queue -lpthread
 
 TARGETS:= dhcp_protect

src/dp_helpers.c

 	int error = 0;
 
 	printf("Loading configuration %s\n",file);
-	
+
+	memset(conf, 0, sizeof(dp_conf));
 
 	if ( ( fh = fopen(file,"r") ) == NULL ) {
 		fprintf(stderr,"Failed to open configuration file '%s': %s\n", file, strerror(errno));
 			fprintf(stderr,"unknown directive '%s', ignored\n", name);
 
 		free(line);
+		len=0;
+		line=NULL;
 	}
+
 	fclose(fh);
 
 	if ( conf->pktint < 1 || conf->pktint > 1000 ) {