Fix the comment for POINT_CONVERSION_UNCOMPRESSED

The |z| value should be 0x04 not 0x02

RT#3838

(Imported from upstream's 41fe7d2380617da515581503490f1467ee75a521.)

Change-Id: I35745cd2a5a32bd726cb4d3c0613cef2bcbef35b
Reviewed-on: https://boringssl-review.googlesource.com/5946
Reviewed-by: Adam Langley <agl@google.com>
1 file changed