algo.h: fix to make it work on Lua 5.1; oops

LuaDist · Oct 17, 2012 · 1ed3290 · 1ed3290
1 parent a23eb89
commit 1ed3290
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/src/algo.h b/src/algo.h
@@ -134,7 +134,11 @@ static void check_subject (lua_State *L, int pos, TArgExec *argE)
                   lua_typename (L, type));
     argE->text = lua_touserdata (L, -1);
     lua_pop (L, 1);
+#if LUA_VERSION_NUM == 501
+    lua_objlen (L, pos);
+#else
     lua_len (L, pos);
+#endif
     type = lua_type (L, -1);
     if (type != LUA_TNUMBER)
       luaL_error (L, "subject's length is %s (expected number)",