Fix Windows build (#4892)

rtgui/batchqueue.cc

@@ -436,7 +436,9 @@ void BatchQueue::cancelItems (const std::vector<ThumbBrowserEntryBase*>& items)
             if (entry->thumbnail)
                 entry->thumbnail->imageRemovedFromQueue ();
 
-            const auto func = [](BatchQueueEntry* bqe) -> bool {
+            const auto func =
+                [](BatchQueueEntry* bqe) -> bool
+                {
                     ::g_remove(bqe->savedParamsFile.c_str());
                     return false;
                 };

rtgui/dirbrowser.cc

@@ -248,13 +248,14 @@ int updateVolumesUI (void* br)
 
 void DirBrowser::winDirChanged ()
 {
-    const auto func = [](gpointer data) -> gboolean {
-        static_cast<DirBrowser*>(data)->updateDirTreeRoot();
-
-        return FALSE;
+    const auto func =
+        [](DirBrowser* self) -> bool
+        {
+            self->updateDirTreeRoot();
+            return false;
         };
 
-    idle_register.add(func, this);
+    idle_register.add<DirBrowser>(func, this, false);
 }
 #endif
 

rtgui/filecatalog.cc

@@ -1793,13 +1793,14 @@ void FileCatalog::reparseDirectory ()
 
 void FileCatalog::winDirChanged ()
 {
-    const auto func = [](gpointer data) -> gboolean {
-        static_cast<FileCatalog*>(data)->reparseDirectory();
-
-        return FALSE;
+    const auto func =
+        [](FileCatalog* self) -> bool
+        {
+            self->reparseDirectory();
+            return false;
         };
 
-    idle_register.add(func, this);
+    idle_register.add<FileCatalog>(func, this, false);
 }
 
 #else