replace use of 'long/int bitmapType' with 'wxBitmapType bitmapType' in richtext and wxMemoryFSHandler

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@53535 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gdicmn.h

@@ -80,6 +80,8 @@ enum wxBitmapType
     wxBITMAP_TYPE_TGA,
     wxBITMAP_TYPE_MACCURSOR,
     wxBITMAP_TYPE_MACCURSOR_RESOURCE,
+
+    wxBITMAP_TYPE_MAX,
     wxBITMAP_TYPE_ANY = 50
 };