RFR: 8305667: Some fonts installed in user directory are not detected on Windows [v2]

[Nikita Gubarkov]

> `data` array has size of `MAX_BUFFER` like `wname`, but it has a char type, so its size is twice smaller than actual path limit, because paths returned by `RegEnumValueW` use wide chars. We need to double this limit.

Nikita Gubarkov has updated the pull request incrementally with one additional commit since the last revision:

  Use malloc instead of fixed size buffers.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/13359/files
  - new: https://git.openjdk.org/jdk/pull/13359/files/63d26f84..d6218b55

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=13359&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=13359&range=00-01

  Stats: 22 lines in 1 file changed: 6 ins; 9 del; 7 mod
  Patch: https://git.openjdk.org/jdk/pull/13359.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13359/head:pull/13359

PR: https://git.openjdk.org/jdk/pull/13359