Added some casts in hopes of fixing HP compilation problem

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@8188 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/sashwin.cpp

@@ -73,6 +73,7 @@ void wxSashWindow::Init()
     m_maximumPaneSizeY = 10000;
     m_sashCursorWE = new wxCursor(wxCURSOR_SIZEWE);
     m_sashCursorNS = new wxCursor(wxCURSOR_SIZENS);
+    m_mouseCaptured = FALSE;
 
     // Eventually, we'll respond to colour change messages
     InitColours();
@@ -106,6 +107,7 @@ void wxSashWindow::OnMouseEvent(wxMouseEvent& event)
     if (event.LeftDown())
     {
         CaptureMouse();
+        m_mouseCaptured = TRUE;
 
         if ( sashHit != wxSASH_NONE )
         {
@@ -144,7 +146,10 @@ void wxSashWindow::OnMouseEvent(wxMouseEvent& event)
     else if ( event.LeftUp() && m_dragMode == wxSASH_DRAG_LEFT_DOWN )
     {
         // Wasn't a proper drag
-        ReleaseMouse();
+        if (m_mouseCaptured)
+            ReleaseMouse();
+        m_mouseCaptured = FALSE;
+
         wxScreenDC::EndDrawingOnTop();
         m_dragMode = wxSASH_DRAG_NONE;
         m_draggingEdge = wxSASH_NONE;
@@ -153,7 +158,10 @@ void wxSashWindow::OnMouseEvent(wxMouseEvent& event)
     {
         // We can stop dragging now and see what we've got.
         m_dragMode = wxSASH_DRAG_NONE;
-        ReleaseMouse();
+        if (m_mouseCaptured)
+            ReleaseMouse();
+        m_mouseCaptured = FALSE;
+
         // Erase old tracker
         DrawSashTracker(m_draggingEdge, m_oldX, m_oldY);
 
@@ -273,7 +281,9 @@ void wxSashWindow::OnMouseEvent(wxMouseEvent& event)
     }
     else if ( event.LeftUp() )
     {
-        ReleaseMouse();
+        if (m_mouseCaptured)
+           ReleaseMouse();
+        m_mouseCaptured = FALSE;
     }
     else if (event.Moving() && !event.Dragging())
     {