PUI Dialogs fixes

- fix double zoom on mouse wheel in map
- change getName() to return const char* to see if that fixes the crash in linux.

src/GUI/FGPUIDialog.cxx

@@ -102,7 +102,7 @@ validate_format(const char *f)
 class fgPopup : public puPopup {
 public:
   fgPopup(FGPUIDialog *parent_dialog, int x, int y, bool r = true, bool d = true) :
-  puPopup(x, y), _draggable(d), _resizable(r), _dragging(false), parentDialog(parent_dialog)
+  puPopup(x, y), _draggable(d), parentDialog(parent_dialog), _resizable(r), _dragging(false)
   {}
   int checkHit(int b, int up, int x, int y);
   int checkKey(int key, int updown);
@@ -719,9 +719,9 @@ FGPUIDialog::~FGPUIDialog ()
 void FGPUIDialog::bringToFront() {
     puMoveToLast(_object);
 }
-std::string FGPUIDialog::getName()
+const char *FGPUIDialog::getName()
 {
-    return _name;
+    return _name.c_str();
 }
 
 void

src/GUI/FGPUIDialog.hxx

@@ -100,7 +100,7 @@ public:
     void setNeedsLayout() {
       _needsRelayout = true;
     }
-    virtual std::string getName();
+    virtual const char * getName();
     virtual void bringToFront();
 
     class ActiveWidget

src/GUI/MapWidget.cxx

@@ -512,13 +512,15 @@ void MapWidget::doHit( int button, int updown, int x, int y )
     handlePan(x, y);
     return;
   }
-  
-  if (button == 3) { // mouse-wheel up
-    zoomIn();
-  } else if (button == 4) { // mouse-wheel down
-    zoomOut();
+  if (updown == PU_DOWN)
+  {
+      if (button == 3) { // mouse-wheel up
+          zoomIn();
+      }
+      else if (button == 4) { // mouse-wheel down
+          zoomOut();
+      }
   }
-  
   _hitLocation = SGVec2d(x - abox.min[0], y - abox.min[1]);
   if ((button == 2) && (updown == PU_DOWN)) {
     _clickGeod = unproject(_hitLocation - SGVec2d(_width>>1, _height>>1));

src/GUI/dialog.hxx

@@ -59,7 +59,7 @@ public:
      */
     virtual void update () = 0;
 
-    virtual std::string getName() { return std::string(); }
+    virtual const char *getName() { return ""; }
     virtual void bringToFront() {}
 protected:
     /**