Avoid recreating spatialite handles

Author: m-kuhn

src/providers/spatialite/qgsspatialiteconnection.cpp

@@ -731,7 +731,7 @@ QgsSqliteHandle *QgsSqliteHandle::openDb( const QString &dbPath, bool shared )
 
   QgsDebugMsg( "Connection to the database was successful" );
 
-  QgsSqliteHandle *handle = new QgsSqliteHandle( database.release(), dbPath, shared );
+  QgsSqliteHandle *handle = new QgsSqliteHandle( std::move( database ), dbPath, shared );
   if ( shared )
     sHandles.insert( dbPath, handle );
 

src/providers/spatialite/qgsspatialiteconnection.h

@@ -137,12 +137,12 @@ class QgsSqliteHandle
     // a class allowing to reuse the same sqlite handle for more layers
     //
   public:
-    QgsSqliteHandle( sqlite3 *handle, const QString &dbPath, bool shared )
+    QgsSqliteHandle( spatialite_database_unique_ptr &&database, const QString &dbPath, bool shared )
       : ref( shared ? 1 : -1 )
       , mDbPath( dbPath )
       , mIsValid( true )
     {
-      mDatabase.reset( handle );
+      mDatabase = std::move( database );
     }
 
     sqlite3 *handle()