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 <[email protected]>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/network/socket/qnativesocketengine_unix.cpp b/src/network/socket/qnativesocketengine_unix.cpp
index 35c1b84ce7a..b6df4122530 100644
--- a/src/network/socket/qnativesocketengine_unix.cpp
+++ b/src/network/socket/qnativesocketengine_unix.cpp
@@ -436,6 +436,7 @@ bool QNativeSocketEnginePrivate::nativeConnect(const QHostAddress &addr, quint16
         case EFAULT:
         case ENOTSOCK:
             socketState = QAbstractSocket::UnconnectedState;
+            break;
         default:
             break;
         }