QtNetwork: fix GCC 7 warnings

GCC 7 warns about implicit fall-throughs now.

Fix by adding the missing Q_FALLTHROUGH(), and, in one case, by
moving the existing suppressant into the correct position.

Change-Id: I7383f47e690b6334ef69c9df745c2205247ca7d0
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>

1 files changed, 7 insertions, 1 deletions

diff --git a/src/network/kernel/qhostaddress.cpp b/src/network/kernel/qhostaddress.cpp
index 8fac76f86a..086e8cede1 100644
--- a/src/network/kernel/qhostaddress.cpp
+++ b/src/network/kernel/qhostaddress.cpp
@@ -291,21 +291,27 @@ bool QNetmaskAddress::setAddress(const QHostAddress &address)
             d->clear();
             return false;       // invalid IP-style netmask
 
-            // the rest always falls through
         case 254:
             ++netmask;
+            Q_FALLTHROUGH();
         case 252:
             ++netmask;
+            Q_FALLTHROUGH();
         case 248:
             ++netmask;
+            Q_FALLTHROUGH();
         case 240:
             ++netmask;
+            Q_FALLTHROUGH();
         case 224:
             ++netmask;
+            Q_FALLTHROUGH();
         case 192:
             ++netmask;
+            Q_FALLTHROUGH();
         case 128:
             ++netmask;
+            Q_FALLTHROUGH();
         case 0:
             break;
         }