Some memory leaks.

rtengine/rtthumbnail.cc

@@ -339,6 +339,7 @@ IImage8* Thumbnail::processImage (const procparams::ProcParams& params, int rhei
     // obtain final image
     Image8* readyImg = new Image8 (fw, fh);
     ipf.lab2rgb (labView, readyImg);
+    delete labView;
     delete baseImg;
 
     // calculate scale

rtgui/filecatalog.cc

@@ -500,6 +500,7 @@ void FileCatalog::developRequested (std::vector<FileBrowserEntry*> tbe) {
                 int ph = img->getHeight ();
                 guint8* prev = new guint8 [pw*ph*3];
                 memcpy (prev, img->getData (), pw*ph*3);
+                img->free();
                 listener->addBatchQueueJob (new BatchQueueEntry (pjob, params, tbe[i]->filename, prev, pw, ph, tbe[i]->thumbnail));
             }
             else {