RFR: 8212034: Potential memory leaks in jpegLoader.c in error case

[Ambarish Rapte]

Memory allocated in initDecompressor() and decompressIndirect() is not freed in error case.
In error case,
1. Allocated memory should be freed.
2. Appropriate de-initialization jpeg library calls should be added.

Verified that,
1. All unit and systems tests pass on three platforms, and
2. Memory consumption with and without fix is similar by comparing memory before and after showing 10 jpeg images for 100 times.

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Commits:
 - 7af932b7: 8212034: Memory leaks in jpegLoader.c in error case

Changes: https://git.openjdk.java.net/jfx/pull/54/files
 Webrev: https://webrevs.openjdk.java.net/jfx/54/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8212034
  Stats: 62 lines in 1 file changed: 36 ins; 14 del; 12 mod
  Patch: https://git.openjdk.java.net/jfx/pull/54.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx pull/54/head:pull/54

PR: https://git.openjdk.java.net/jfx/pull/54