Make broadcast_txcost default to false.

babel.c

@@ -161,7 +161,7 @@ main(int argc, char **argv)
         } else if(strcmp(*arg, "-s") == 0) {
             split_horizon = 0;
         } else if(strcmp(*arg, "-b") == 0) {
-            broadcast_txcost = 0;
+            broadcast_txcost = 1;
         } else if(strcmp(*arg, "-S") == 0) {
             SHIFTE();
             state_file = *arg;

message.c

@@ -45,7 +45,7 @@ unsigned int jitter;
 unsigned int update_jitter;
 int parasitic = 0;
 int silent_time = 30;
-int broadcast_txcost = 1;
+int broadcast_txcost = 0;
 int split_horizon = 1;
 
 unsigned char seqno = 0;