fix crash bug when buying a card pack

This fixes the shop crashing the game when you buy a card packs in the
shop. The targeting indicator looks at the stack so it needs to be
enabled only when you're in the "game"...

projects/mtg/src/CardGui.cpp

@@ -248,6 +248,8 @@ void CardGui::Render()
 	        renderer->RenderQuad(fakeborder.get(), actX, actY, actT, (29 * actZ + 1) / 16, 42 * actZ / 16);
         }
         //draw border for highlighting
+        if (game)
+        {
             if (card && card->isTargetted() && highlightborder)
             {
                 highlightborder->SetColor(ARGB(95,255,0,0));
@@ -258,6 +260,7 @@ void CardGui::Render()
                 highlightborder->SetColor(ARGB(95,0,245,0));
 	            renderer->RenderQuad(highlightborder.get(), actX, actY, actT, (30 * actZ + 1) / 16, 43 * actZ / 16);
             }
+        }
         //draw the card image
         renderer->RenderQuad(quad.get(), actX, actY, actT, scale, scale);
     }
@@ -300,6 +303,8 @@ void CardGui::Render()
     }
 
     //draw line
+    if (game)
+    {
         if (card && card->isTargetted())
         {
 	        if(card->isTapped())
@@ -324,6 +329,7 @@ void CardGui::Render()
             else
                 renderer->DrawRoundRect(actX - (scale * quad->mWidth / 2)-2,actY - (scale * quad->mHeight / 2)-2, (scale * quad->mWidth)-0.02f, (scale * quad->mHeight)-0.02f, 1.8f,ARGB(250,0,255,0));
        }
+    }
 
     //draws the numbers power/toughness
     if (card->isCreature())