Fix -Wimplicit-fallthrough for clang

Clang's `-Wimplicit-fallthrough` warnings are a little stricter than
gcc's interpretation:

switch (i) {
case 0:
    foo();
case 4:
    break;
}

While gcc accepts the implicit fallthrough, if the following statement
is a trivial `break`, clang will warn about it.

Pick-to: 6.7
Change-Id: I38e0817f1bc034fbb552aeac21de1516edcbcbb0
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/plugins/generic/tuiotouch/qtuiohandler.cpp b/src/plugins/generic/tuiotouch/qtuiohandler.cpp
index a304963669..2815368e84 100644
--- a/src/plugins/generic/tuiotouch/qtuiohandler.cpp
+++ b/src/plugins/generic/tuiotouch/qtuiohandler.cpp
@@ -59,6 +59,7 @@ QTuioHandler::QTuioHandler(const QString &specification)
             case 180:
             case 270:
                 rotationAngle = argValue;
+                break;
             default:
                 break;
             }