It's possible now to save to a PNG. OK, I still

have performance problems, but it's a start.
  Updated install.txt.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@662 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk1/dcmemory.cpp

@@ -14,6 +14,10 @@
 
 #include "wx/dcmemory.h"
 
+#ifdef USE_GDK_IMLIB
+#include "../gdk_imlib/gdk_imlib.h"
+#endif
+
 //-----------------------------------------------------------------------------
 // wxMemoryDC
 //-----------------------------------------------------------------------------
@@ -23,13 +27,23 @@ IMPLEMENT_DYNAMIC_CLASS(wxMemoryDC,wxPaintDC)
 wxMemoryDC::wxMemoryDC(void)
 {
   m_ok = FALSE;
+  
+#ifdef USE_GDK_IMLIB
+  m_cmap = gdk_imlib_get_colormap();
+#else
   m_cmap = gdk_colormap_get_system();
+#endif
 }
 
 wxMemoryDC::wxMemoryDC( wxDC *WXUNUSED(dc) )
 {
   m_ok = FALSE;
+  
+#ifdef USE_GDK_IMLIB
+  m_cmap = gdk_imlib_get_colormap();
+#else
   m_cmap = gdk_colormap_get_system();
+#endif
 }
 
 wxMemoryDC::~wxMemoryDC(void)