[OpenJDK 2D-Dev] RFR: JDK-8263362: Avoid division by 0 in java/awt/font/TextJustifier.java justify

[Matthias Baesken]

In java/awt/font/TextJustifier.java justify-method there is a potential code path where divison by zero might happen , see also the Sonar finding 
https://sonarcloud.io/project/issues?id=shipilev_jdk&open=AXcqMwpm8sPJZZzONu1k&resolved=false&severities=CRITICAL&types=BUG


            boolean hitLimit = (weight == 0) || (!lastPass && ((delta < 0) == (delta < gslimit)));
            boolean absorbing = hitLimit && absorbweight > 0;
            // predivide delta by weight
            float weightedDelta = delta / weight; // not used if weight == 0

In case of (weight == 0) the division should not be done because the value of weightedDelta is unused in this case anyway.

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Commit messages:
 - JDK-8263362

Changes: https://git.openjdk.java.net/jdk/pull/2912/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2912&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8263362
  Stats: 4 lines in 1 file changed: 3 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2912.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2912/head:pull/2912

PR: https://git.openjdk.java.net/jdk/pull/2912