Fixed an error when closing several open wtt widgets.

wb/exe/wb/qt/wb_qt.cpp

@@ -86,7 +86,7 @@ int main(int argc, char* argv[])
 
   QApplication app(argc, argv);
   QApplication::setStyle(new PwrStyle());
-  WbQt(argc, argv);
+  Wb::main_wb = new WbQt(argc, argv);
   return app.exec();
 }
 

wb/exe/wb/qt/wb_qt.h

@@ -44,7 +44,7 @@
 #include <QWidget>
 
 class WbQt : public Wb {
-  public:
+public:
   QWidget* toplevel;
   QWidget* mainwindow;
 

wb/exe/wb/src/wb_main.cpp

@@ -497,6 +497,8 @@ int Wb::vsel_success(void* vselctx, pwr_tVolumeId* volumelist, int volume_count)
   int sts;
   pwr_tStatus status;
 
+  wb->appl_count--;
+
   sts = 1;
   if (CoLogin::privilege() & pwr_mPrv_DevRead) {
     for (i = 0; i < volume_count; i++) {

wb/lib/wb/qt/wb_wtt_qt.cqt

@@ -2320,6 +2320,8 @@ WttQt::~WttQt()
     options_form->close();
   }
 
+  delete toplevel;
+
   if (!close_cb) {
     debug_print("Shutting down...\n");
     exit(0);