NPCMoreTalkHandler: don't underflow selection

src/main/java/net/server/channel/handlers/NPCMoreTalkHandler.java

@@ -60,6 +60,11 @@ public final class NPCMoreTalkHandler extends AbstractPacketHandler {
                 selection = p.readInt();
             } else if (p.available() > 0) {
                 selection = p.readByte();
+                // If there are more than 127 choices, don't underflow to -128.
+                // This is useful if you want to have more than 127 hairs/faces at a stylist NPC.
+                if (selection < 0) {
+                    selection += 256;
+                }
             }
             if (c.getQM() != null) {
                 if (c.getQM().isStart()) {