fix windows build

Author: jef-n

src/app/qgsdatumtransformtablewidget.h

@@ -44,6 +44,7 @@ class APP_EXPORT QgsDatumTransformTableModel : public QAbstractTableModel
     };
 
     QgsDatumTransformTableModel( QObject *parent = nullptr );
+    ~QgsDatumTransformTableModel() {}
 
     void setTransformContext( const QgsCoordinateTransformContext &context );
 

src/providers/ogr/qgsgeopackagedataitems.cpp

@@ -743,6 +743,12 @@ bool QgsGeoPackageAbstractLayerItem::executeDeleteLayer( QString &errCause )
   return false;
 }
 
+static int collect_strings( void *names, int argc, char **argv, char ** )
+{
+  *static_cast<QList<QString>*>( names ) << QString::fromUtf8( argv[ 0 ] );
+  return 0;
+}
+
 QList<QString> QgsGeoPackageAbstractLayerItem::tableNames()
 {
   QList<QString> names;
@@ -758,15 +764,11 @@ QList<QString> QgsGeoPackageAbstractLayerItem::tableNames()
     {
       char *sql = sqlite3_mprintf( "SELECT table_name FROM gpkg_contents;" );
       status = sqlite3_exec(
-                 database.get(),               /* An open database */
-                 sql,                          /* SQL to be evaluated */
-                 +[]( void *names, int, char **argv, char ** )
-      {
-        *static_cast<QList<QString>*>( names ) << QString( argv[ 0 ] );
-        return 0;
-      },                            /* Callback function */
-      &names,                       /* 1st argument to callback */
-      &errmsg                       /* Error msg written here */
+                 database.get(),              /* An open database */
+                 sql,                         /* SQL to be evaluated */
+                 collect_strings,             /* Callback function */
+                 &names,                      /* 1st argument to callback */
+                 &errmsg                      /* Error msg written here */
                );
       sqlite3_free( sql );
       if ( status != SQLITE_OK )

src/ui/qgsrasterlayersaveasdialogbase.ui

@@ -646,7 +646,7 @@ datasets with maximum width and height specified below.</string>
       </widget>
      </item>
      <item>
-      <spacer name="horizontalSpacer">
+      <spacer name="horizontalSpacer1">
        <property name="orientation">
         <enum>Qt::Horizontal</enum>
        </property>

src/ui/qgsvectorlayersaveasdialogbase.ui

@@ -407,7 +407,7 @@
     </widget>
    </item>
    <item>
-    <layout class="QHBoxLayout" name="horizontalLayout">
+    <layout class="QHBoxLayout" name="horizontalLayout1">
      <item>
       <widget class="QDialogButtonBox" name="mHelpButtonBox">
        <property name="orientation">