Compile fixes

Plugin/CutSphere.cpp

+
+#include <string.h>
 #include "CutSphere.h"
 
 double opt_cut_sphere_Xc(OPT_ARGS_NUM)

Plugin/LevelsetPlugin.cpp

-#include "LevelSetPlugin.h"
+#include "LevelsetPlugin.h"
 #include "List.h"
 #include "Views.h"
 #include "Iso.h"
-#include "Message.h"
 
 // that's the bad part of the story ...
 extern Post_View *ActualView;

Plugin/Plugin.cpp

-#include <stdio.h>
+
 #include <dlfcn.h>
 #include <map>
+#include <FL/filename.H>
+
 #include "Plugin.h"
 #include "PluginManager.h"
-#include "Message.h"
-#include <FL/filename.H>
+
 #include "CutPlane.h"
 #include "CutSphere.h"
 #include "CutMap.h"

Plugin/Plugin.h

@@ -12,8 +12,11 @@
   directly in the executable. I think that it's a good 
   way to start.
 */
+
+#include <string.h>
 #include <stdio.h>
 #include "Options.h"
+#include "Message.h"
 
 
 class PluginDialogBox;