diff -urN yaboot-1.3.15-05122010/second/file.c yaboot-1.3.15-05122010-sanedhcppriority//second/file.c
--- yaboot-1.3.15-05122010/second/file.c	2010-05-26 18:50:03.000000000 -0400
+++ yaboot-1.3.15-05122010-sanedhcppriority//second/file.c	2010-05-26 18:51:10.000000000 -0400
@@ -237,7 +237,7 @@
 
           switch (tag) {
                case DHCP_NETMASK:
-                    if ((result->subnetmask == NULL || *(result->subnetmask) == '\x0') && value != 0) {
+                    if (value != 0) {
                          result->subnetmask = ipv4_to_str(value);
                          DEBUG_F("Storing %s as subnetmask from options\n",
                                  result->subnetmask);
@@ -245,8 +245,7 @@
                     /* FIXME: do we need to grok the subnet mask? */
                     break;
                case DHCP_ROUTERS:
-                    if ((result->giaddr == NULL || *(result->giaddr) == '\x0')
-                        && value != 0) {
+                    if (value != 0) {
                          result->giaddr = ipv4_to_str(value);
                          DEBUG_F("Storing %s as gateway from options\n",
                                  result->giaddr);