slot based allocator for lua, usage of lua_createtable

src/twn_textures.c

@@ -439,6 +439,8 @@ TextureKey textures_get_key(TextureCache *cache, const char *path) {
         }
     }
 
+    /* TODO: this will be bad when dynamic strings are involved */
+    /* to mitigate that we could free ptr_to_texture each frame */
     /* try loading */
     last_texture = textures_load(cache, path);
     hmput(ptr_to_texture, path, last_texture);