Expose traps to lua

src/cmd.c

@@ -1350,7 +1350,7 @@ wiz_map_levltyp(VOID_ARGS)
 
 /* temporary? hack, since level type codes aren't the same as screen
    symbols and only the latter have easily accessible descriptions */
-static const char *levltyp[] = {
+const char *levltyp[] = {
     "stone", "vertical wall", "horizontal wall", "top-left corner wall",
     "top-right corner wall", "bottom-left corner wall",
     "bottom-right corner wall", "cross wall", "tee-up wall", "tee-down wall",
@@ -1366,6 +1366,15 @@ static const char *levltyp[] = {
     ""
 };
 
+const char *
+levltyp_to_name(typ)
+int typ;
+{
+    if (typ >= 0 && typ < MAX_TYPE)
+        return levltyp[typ];
+    return NULL;
+}
+
 /* explanation of base-36 output from wiz_map_levltyp() */
 static void
 wiz_levltyp_legend(VOID_ARGS)