Provide only one data rate per user for VHT frames.

Don't provide an extra not-per-user data rate equal to the data rate for
the highest user number; that makes no sense.

Bug: 15928
Change-Id: Ie6bf5853d630bbf33afd423dc7a8eca26abdf83a
Reviewed-on: https://code.wireshark.org/review/34018
Petri-Dish: Guy Harris <[email protected]>
Tested-by: Petri Dish Buildbot
Reviewed-by: Guy Harris <[email protected]>
(cherry picked from commit 3c7ec127)
Reviewed-on: https://code.wireshark.org/review/34021
9 jobs for master-2.4 in 36 minutes and 19 seconds (queued for 1 second)
latest
Status Job ID Name Coverage
  Test
passed #255529648
gcc-5

00:31:57

passed #255529649
gcc-5-noextcap

00:30:55

passed #255529650
gcc-5-nopcap

00:32:22

passed #255529651
gcc-6

00:33:01

passed #255529652
gcc-6-noextcap

00:34:08

passed #255529653
gcc-6-nopcap

00:36:16

passed #255529654
gcc-7

00:34:09

passed #255529655
gcc-7-noextcap

00:35:29

passed #255529656
gcc-7-nopcap

00:34:05