Fix critical typo with _q_startAsyncWrite()
Fix critical typo with _q_startAsyncWrite()

Commit 62dfdeb3642250bdb642dbf607a8c7b95e57835e introduce a
critical typo that revert a bug which are fixed in the
b4d5bd813f591dc618e0fff2d55d93eeccb1a26e commit.

Change-Id: I9ed29f5b443cbd7102878287d531d18a9351a2e5
Reviewed-by: Oswald Buddenhagen <6a8868beda3e139b5ac22b2534a23d3e6ba81819@theqtcompany.com>
Reviewed-by: Sergey Belyashov <8871b4c2d635fca691211507eadbac3d0bc2695a@gmail.com>
Reviewed-by: Thiago Macieira <0ed1648d92ca0373297a182b1dba1b974ad10d88@intel.com>

RoadWorksSoftware/QtSerialPort-OS2,RoadWorksSoftware/QtSerialPort-OS2