v0.7.5: fixed some rare concurrency errors with sparsearray

SPD-classes/src/main/java/com/watabou/utils/SparseArray.java

@@ -32,7 +32,11 @@ public class SparseArray<T> extends IntMap<T> {
 		return keys().toArray().toArray();
 	}
 	
-	public List<T> toList() {
+	public T[] valueArray(){
+		return values().toArray().toArray();
+	}
+	
+	public List<T> valueList() {
 		return Arrays.asList(values().toArray().toArray());
 	}
 }