even more printfs

kern/synchprobs/traffic_synch.c

@@ -232,6 +232,7 @@ void intersection_before_entry(Direction origin, Direction destination)
           temp->cv = cv_create("carcv");
         }
         
+        kprintf("actually sleeping now\n");
         cv_wait(temp->cv, globlock); // sleep and reacquire lock once woken
         goto RESTART; // now we have to make sure there's nothing else screwing us over
       }