Consistently refuse to create bitmaps with 0 width or height.

Homogenize the behaviour of all ports when creating bitmaps with 0 width or
height: just fail always as it doesn't seem to make sense to support this.

Closes #16828.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@78434 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/osx/core/bitmap.cpp

@@ -1191,6 +1191,8 @@ bool wxBitmap::Create(int w, int h, int d)
 {
     UnRef();
 
+    wxCHECK_MSG(w > 0 && h > 0, false, "invalid bitmap size");
+
     if ( d < 0 )
         d = wxDisplayDepth() ;