Fix warnings about implicit double to int conversions in propgrid.

Use wxRound() instead of implicit casts to convert double to int. This not
only avoids warnings (e.g. when using g++ with -Wconversion) but also should
be (marginally) more precise.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@68153 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/propgrid/property.cpp

@@ -24,6 +24,7 @@
     #include "wx/hash.h"
     #include "wx/string.h"
     #include "wx/log.h"
+    #include "wx/math.h"
     #include "wx/event.h"
     #include "wx/window.h"
     #include "wx/panel.h"
@@ -2103,8 +2104,8 @@ void wxPGProperty::SetValueImage( wxBitmap& bmp )
             // Here we use high-quality wxImage scaling functions available
             wxImage img = bmp.ConvertToImage();
             double scaleY = (double)maxSz.y / (double)imSz.y;
-            img.Rescale(((double)bmp.GetWidth())*scaleY,
-                        ((double)bmp.GetHeight())*scaleY,
+            img.Rescale(wxRound(bmp.GetWidth()*scaleY),
+                        wxRound(bmp.GetHeight()*scaleY),
                         wxIMAGE_QUALITY_HIGH);
             wxBitmap* bmpNew = new wxBitmap(img, 32);
         #else