Do not reserve memory when copy/paste objects through file

src/Gui/MainWindow.cpp

@@ -1591,11 +1591,13 @@ QMimeData * MainWindow::createMimeDataFromSelection () const
     // if less than ~10 MB
     bool use_buffer=(memsize < 0xA00000);
     QByteArray res;
-    try {
-        res.reserve(memsize);
-    }
-    catch (const Base::MemoryException&) {
-        use_buffer = false;
+    if(use_buffer) {
+        try {
+            res.reserve(memsize);
+        }
+        catch (const std::bad_alloc &) {
+            use_buffer = false;
+        }
     }
 
     WaitCursor wc;