Eliminate (or at least reduce) 64-bit build warnings (as described in wxPG sourceforge bug report #2156069)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@56239 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/propgrid/editors.h

@@ -322,7 +322,7 @@ public:
     /**
         Returns number of buttons.
     */
-    int GetCount();
+    unsigned int GetCount();
 
     /**
         Returns size of primary editor control, as appropriately

interface/wx/propgrid/property.h

@@ -1194,7 +1194,7 @@ public:
     /**
         Returns child property at index i.
     */
-    wxPGProperty* Item( size_t i ) const;
+    wxPGProperty* Item( unsigned int i ) const;
 
     /**
         If property's editor is active, then update it's value.
@@ -1448,17 +1448,17 @@ public:
     /**
         Returns labe of item.
     */
-    const wxString& GetLabel( size_t ind ) const;
+    const wxString& GetLabel( unsigned int ind ) const;
 
     /**
         Returns number of items.
     */
-    size_t GetCount () const;
+    unsigned int GetCount() const;
 
     /**
         Returns value of item;
     */
-    int GetValue( size_t ind ) const;
+    int GetValue( unsigned int ind ) const;
 
     /**
         Returns array of values matching the given strings. Unmatching strings

interface/wx/propgrid/propgrid.h

@@ -525,7 +525,7 @@ public:
     /**
         Returns number of columns currently on grid.
     */
-    int GetColumnCount() const;
+    unsigned int GetColumnCount() const;
 
     /**
         Returns colour of empty space below properties.