add support for table border width attribute (closes #10610)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@60363 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/html/htmlcell.h

@@ -413,8 +413,10 @@ public:
             Colour of top and left lines
         @param clr2
             Colour of bottom and right lines
+        @param border
+            Size of the border in pixels
     */
-    void SetBorder(const wxColour& clr1, const wxColour& clr2);
+    void SetBorder(const wxColour& clr1, const wxColour& clr2, int border = 1);
 
     /**
         Sets the indentation (free space between borders of container and subcells).