v0.9.0b: adjusted shield logic, fixes warrior bug and stops overriding

core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/buffs/ShieldBuff.java

@@ -53,7 +53,7 @@ public abstract class ShieldBuff extends Buff {
 	}
 
 	public void setShield( int shield, float delay ) {
-		this.shielding = shield;
+		if (this.shielding <= shield) this.shielding = shield;
 		if (target != null) target.needsShieldUpdate = true;
 		spend(delay);
 	}

core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/items/BrokenSeal.java

@@ -150,7 +150,7 @@ public class BrokenSeal extends Item {
 				dmg = 0;
 			} else {
 				dmg -= shielding();
-				setShield(0);
+				decShield(shielding());
 			}
 			return dmg;
 		}