Erwan

- fix for issue 348
- Fix a bug when going out of the deck editor then back to it again would show an incorrect color icon instead of nothing
- Fix a bug where the AI tries to play a spell with a target instead of just checking if it can play it. (visually, this showed as the AI tapping mana, then "freezing" for a few seconds with some cards grayed out on the battlefield)

projects/mtg/src/GameStateShop.cpp

@@ -304,7 +304,6 @@ void GameStateShop::load(){
   int nbsets = 0;
   int nbboostersets = 0;
 
-  JQuad * mBackThumb = resources.GetQuad("back_thumb");
   for(int i=0;i<BOOSTER_SLOTS;i++){
     mBooster[i].randomize(packlist);
     mInventory[i] = 1+rand()%mBooster[i].maxInventory();