[jdk13u-dev] Integrated: 8255845: Memory leak in imageFile.cpp

[Yuri Nesterenko]

fix here, too, for consistency. Clean; no regressions found.

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Commit messages:
 - Backport 66a2e70985fcdb8e0b91b05fbeae825db6ae9c78

Changes: https://git.openjdk.java.net/jdk13u-dev/pull/194/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk13u-dev&pr=194&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8255845
  Stats: 2 lines in 1 file changed: 1 ins; 1 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk13u-dev/pull/194.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk13u-dev pull/194/head:pull/194

PR: https://git.openjdk.java.net/jdk13u-dev/pull/194