Only destroy huffman if build succeeded.

The earlier code assumed that if jpeg_create_huffman_index
succeeded but jpeg_build_huffman_index failed that the
index would still need to be destroyed. This is not the
case. Only call jpeg_destroy_huffman_index if both
succeeded.

BUG=http://b.corp.google.com/issue?id=10263847

Change-Id: I3fbc7ac507ce11134565ebe50bd6be95e276b8e4
1 file changed