isosurf corrections

#ifdeffed tab code in wxPanel


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@1669 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

utils/glcanvas/samples/isosurf/Makefile

@@ -22,8 +22,8 @@ isosurf: isosurf.o glcanvas.o
 isosurf.o: isosurf.cpp
 	$(CC) `wx-config --cflags` -I../../gtk -c isosurf.cpp
 
-glcanvas.o: ../..gtk/glcanvas.cpp
+glcanvas.o: ../../gtk/glcanvas.cpp
 	$(CC) `wx-config --cflags` `gtk-config --cflags` -I../../gtk -c ../../gtk/glcanvas.cpp
 
 clean: 
-	rm -f *.o cube
+	rm -f *.o isosurf

utils/glcanvas/samples/isosurf/isosurf.cpp

@@ -254,11 +254,7 @@ bool MyApp::OnInit(void)
 			GLX_DOUBLEBUFFER, None };
 #endif
 
-  if(!doubleBuffer
-#ifdef __WXGTK__ // JACS
-   || !wxGLCanvas::HaveVisual(gl_attrib)
-#endif
-   )
+  if(!doubleBuffer)
    {
       printf("don't have double buffer, disabling\n");
 #ifdef __WXGTK__