macOS: Handle missing key in QKeySequencePrivate::decodeString()

On macOS we pull out all the modifiers up front, which in the case
of incomplete key sequences such as "Meta+Shift+" will result in
an empty string as a result. The cross-platform code does not
handle that case, so we need to exit early.

This fixes an assert in tst_QKeySequence::parseString().

An assert has been added to QKeySequencePrivate::decodeString()
to make the assumption about the 'accel' argument explicit.

Change-Id: I135e62f9051a8b899202e5fb224b5d3c77bf2062
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>

0 files changed, 0 insertions, 0 deletions