Merging 1.7.5 Source: actors/buffs changes

src/com/shatteredpixel/shatteredpixeldungeon/actors/buffs/Buff.java

@@ -56,19 +56,29 @@ public class Buff extends Actor {
 	public int icon() {
 		return BuffIndicator.NONE;
 	}
-	
+
+	public static<T extends Buff> T append( Char target, Class<T> buffClass ) {
+		try {
+			T buff = buffClass.newInstance();
+			buff.attachTo( target );
+			return buff;
+		} catch (Exception e) {
+			return null;
+		}
+	}
+
+	public static<T extends FlavourBuff> T append( Char target, Class<T> buffClass, float duration ) {
+		T buff = append( target, buffClass );
+		buff.spend( duration );
+		return buff;
+	}
+
 	public static<T extends Buff> T affect( Char target, Class<T> buffClass ) {
 		T buff = target.buff( buffClass );
 		if (buff != null) {
 			return buff;
 		} else {
-			try {
-				buff = buffClass.newInstance();
-				buff.attachTo( target );
-				return buff;
-			} catch (Exception e) {
-				return null;
-			}
+			return append( target, buffClass );
 		}
 	}