Fix wrong bounds check when colliding with activity zones

I am so stupid.

desktop_version/src/Logic.cpp

@@ -1599,7 +1599,7 @@ void gamelogic(void)
     game.activeactivity = obj.checkactivity();
 
     if (game.hascontrol && !script.running
-    && INBOUNDS_VEC(game.activeactivity, obj.entities))
+    && INBOUNDS_VEC(game.activeactivity, obj.blocks))
     {
         game.activity_lastprompt = obj.blocks[game.activeactivity].prompt;
         game.activity_r = obj.blocks[game.activeactivity].r;