Fix some of cppcheck warnings

Summary:
- selfInitialization
- memleak

I could probably suppress the selfInitialization warning, but probably
is cleaner this way. Opinions welcome. This also fixes the memleak in
autotest.

Test Plan:
- arc lint --everything
- Fix issues
- build
- run tests

Reviewers: #frameworks, aacid

Reviewed By: aacid

Subscribers: apol, aacid, kde-frameworks-devel

Tags: #frameworks

Differential Revision: https://phabricator.kde.org/D13559

src/wayland/autotests/server/test_display.cpp

@@ -207,10 +207,10 @@ void TestWaylandServerDisplay::testConnectNoSocket()
 
 void TestWaylandServerDisplay::testOutputManagement()
 {
-    auto display = new KWayland::Server::Display(this);
-    display->setSocketName("kwayland-test-0");
-    display->start();
-    auto kwin = display->createOutputManagement(this);
+    Display display;
+    display.setSocketName("kwayland-test-0");
+    display.start();
+    auto kwin = display.createOutputManagement(this);
     kwin->create();
     QVERIFY(kwin->isValid());
 }

src/wayland/dpms_interface.cpp

@@ -34,9 +34,9 @@ const struct org_kde_kwin_dpms_manager_interface DpmsManagerInterface::Private::
 };
 #endif
 
-DpmsManagerInterface::Private::Private(DpmsManagerInterface *q, Display *d)
+DpmsManagerInterface::Private::Private(DpmsManagerInterface *qptr, Display *d)
     : Global::Private(d, &org_kde_kwin_dpms_manager_interface, s_version)
-    , q(q)
+    , q(qptr)
 {
 }
 
@@ -82,9 +82,9 @@ const struct org_kde_kwin_dpms_interface DpmsInterface::Private::s_interface = {
 };
 #endif
 
-DpmsInterface::Private::Private(DpmsInterface *q, DpmsManagerInterface *g, wl_resource *parentResource, OutputInterface *output)
+DpmsInterface::Private::Private(DpmsInterface *q, DpmsManagerInterface *g, wl_resource *parentResource, OutputInterface *outputInterface)
     : Resource::Private(q, g, parentResource, &org_kde_kwin_dpms_interface, &s_interface)
-    , output(output)
+    , output(outputInterface)
 {
 }
 

src/wayland/server/xdgoutput_interface.cpp

@@ -150,9 +150,9 @@ void XdgOutputManagerInterface::Private::getXdgOutputCallback(wl_client *client,
     });
 }
 
-XdgOutputManagerInterface::Private::Private(XdgOutputManagerInterface *q, Display *d)
+XdgOutputManagerInterface::Private::Private(XdgOutputManagerInterface *qptr, Display *d)
     : Global::Private(d, &zxdg_output_manager_v1_interface, s_version)
-    , q(q)
+    , q(qptr)
 {
 }