Redo some list foreach loops

game.c

@@ -521,14 +521,11 @@ static void killplayer(player *pl) {
 }
 
 static void processgenerics(void) {
-	generic *gen,*gen2;
+	generic *gen, *next;
 
-	gen = (generic*) activegeneric.next;
-	while ((listhead*) gen != &activegeneric) {
-		gen2 = gen;
-		gen = (generic*) gen->list.next;
-		++(gen2->timer);
-		gen2->process(gen2);
+	foreach_list_safe(&activegeneric, gen, next) {
+		++(gen->timer);
+		gen->process(gen);
 	}
 }
 
@@ -765,13 +762,10 @@ static void doplayer(player *pl) {
 }
 
 static void processplayers(void) {
-	player *pl, *pl2;
+	player *pl, *next;
 
-	pl = (player*) activeplayers.next;
-	while ((listhead*) pl != &activeplayers) {
-		pl2 = pl;
-		pl = (player*) pl->list.next;
-		doplayer(pl2);
+	foreach_list_safe(&activeplayers, pl, next) {
+		doplayer(pl);
 	}
 }
 
@@ -858,7 +852,7 @@ static int iterate(void) {
 	drawplayers();
 	plotsprites();
 	copyup();
-	if (activegeneric.next == &activegeneric) {
+	if (list_empty(&activegeneric)) {
 		player *pl;
 
 		int deadplayers = 0;