RFR: 7131823: Loading some animated GIFs fails with ArrayIndexOutOfBoundsE…

[Dan Lutker]

…xception: Index 4096 out of bounds for length 4096

Adapted from https://github.com/openjdk/jfx/commit/7b7050c46299c0e6771ae02fbb5ceaf22104d3e4

# Testing done
Build locally on linux and ran jdk_imageio tests.

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Commit messages:
 - 7131823: Loading some animated GIFs fails with ArrayIndexOutOfBoundsException: Index 4096 out of bounds for length 4096

Changes: https://git.openjdk.java.net/jdk/pull/8371/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=8371&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-7131823
  Stats: 173 lines in 2 files changed: 155 ins; 3 del; 15 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8371.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8371/head:pull/8371

PR: https://git.openjdk.java.net/jdk/pull/8371