fix ifdef - its libpng not pnglib :)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@29279 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

diff --git a/include/wx/mac/carbon/pnghand.h b/include/wx/mac/carbon/pnghand.h
index 7f504457d9c4ab447ce4f4aea0b697e9dfabd999..d700daad656d914813312557052f21b139742e47 100644 (file)
--- a/include/wx/mac/carbon/pnghand.h
+++ b/include/wx/mac/carbon/pnghand.h
@@ -18,7 +18,7 @@
 
 #include "wx/defs.h"
 
-#if wxUSE_PNGLIB
+#if wxUSE_LIBPNG
 
 class WXDLLEXPORT wxPNGFileHandler: public wxBitmapHandler
 {