8263362: Avoid division by 0 in java/awt/font/TextJustifier.java justify

Reviewed-by: psadhukhan

Author: MBaesken

src/java.desktop/share/classes/java/awt/font/TextJustifier.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 1999, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2021, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -155,10 +155,13 @@ public float[] justify(float delta) {
  boolean absorbing = hitLimit && absorbweight > 0;
 
  // predivide delta by weight
- float weightedDelta = delta / weight; // not used if weight == 0
+ float weightedDelta = 0;
+ if (weight != 0) { // not used if weight == 0
+ weightedDelta = delta / weight;
+ }
 
  float weightedAbsorb = 0;
- if (hitLimit && absorbweight > 0) {
+ if (hitLimit && absorbweight != 0) {
  weightedAbsorb = (delta - gslimit) / absorbweight;
  }