Fix some leaks

src/core/qgsdataitem.cpp

@@ -239,6 +239,8 @@ QgsDataItem::~QgsDataItem()
     mDeferredDelete = true;
     mFutureWatcher->waitForFinished();
   }
+
+  delete mFutureWatcher;
 }
 
 QString QgsDataItem::pathComponent( const QString &string )

src/core/qgsproviderregistry.cpp

@@ -237,6 +237,7 @@ QgsProviderRegistry::~QgsProviderRegistry()
       if ( cleanupFunc )
         cleanupFunc();
     }
+    delete it->second;
     ++it;
   }
 }

tests/src/core/testqgsdataitem.cpp

@@ -172,6 +172,7 @@ void TestQgsDataItem::testDirItemChildren()
       }
 
     }
+    qDeleteAll( children );
 
     delete dirItem;
   }

tests/src/core/testqgsrastersublayer.cpp

@@ -103,8 +103,6 @@ void TestQgsRasterSubLayer::initTestCase()
                                         myRasterFileInfo.completeBaseName() );
     qDebug() << "raster metadata: " << mpRasterLayer->dataProvider()->metadata();
     mReport += "raster metadata: " + mpRasterLayer->dataProvider()->metadata();
-
-    QgsMapLayerRegistry::instance()->addMapLayer( mpRasterLayer );
   }
   else
   {
@@ -115,6 +113,7 @@ void TestQgsRasterSubLayer::initTestCase()
 //runs after all tests
 void TestQgsRasterSubLayer::cleanupTestCase()
 {
+  delete mpRasterLayer;
   QgsApplication::exitQgis();
   QString myReportFile = QDir::tempPath() + "/qgistest.html";
   QFile myFile( myReportFile );