Move #include <gvc.h> from the .cxx to the .h files.

That way we are compatible with the old and new graphviz.


git-svn-id: http://root.cern.ch/svn/root/trunk@49096 27541ba8-7e3a-0410-8455-c3a389f83636

graf2d/gviz/Module.mk

@@ -49,7 +49,7 @@ $(GVIZLIB):     $(GVIZO) $(GVIZDO) $(ORDER_) $(MAINLIBS) $(GVIZLIBDEP)
 $(GVIZDS):      $(GVIZH) $(GVIZL) $(ROOTCINTTMPDEP)
 		$(MAKEDIR)
 		@echo "Generating dictionary $@..."
-		$(ROOTCINTTMP) -f $@ -c $(GVIZH) $(GVIZL)
+		$(ROOTCINTTMP) -f $@ -c $(GRAPHVIZINCDIR:%=-I%) $(GVIZH) $(GVIZL)
 
 $(GVIZMAP):     $(RLIBMAP) $(MAKEFILEDEP) $(GVIZL)
 		$(RLIBMAP) -o $@ -l $(GVIZLIB) \

graf2d/gviz/inc/TGraphEdge.h

@@ -20,9 +20,8 @@
 #include "TAttLine.h"
 #endif
 
-struct Agraph_t;
-struct Agedge_t;
-class  TGraphNode;
+#include <gvc.h>
+class TGraphNode;
 
 //////////////////////////////////////////////////////////////////////////
 //                                                                      //

graf2d/gviz/inc/TGraphNode.h

@@ -28,9 +28,7 @@
 #include "TAttLine.h"
 #endif
 
-struct Agraph_t;
-struct Agnode_t;
-
+#include <gvc.h>
 
 //////////////////////////////////////////////////////////////////////////
 //                                                                      //

graf2d/gviz/inc/TGraphStruct.h

@@ -25,8 +25,7 @@
 #include "TList.h"
 #endif
 
-struct Agraph_t;
-struct GVC_s;
+#include <gvc.h>
 
 //////////////////////////////////////////////////////////////////////////
 //                                                                      //

graf2d/gviz/src/TGraphEdge.cxx

@@ -15,8 +15,6 @@
 #include "TGraphEdge.h"
 #include "TGraphNode.h"  
 
-#include <gvc.h>
-
 ClassImp(TGraphEdge)
 
 //______________________________________________________________________________

graf2d/gviz/src/TGraphNode.cxx

@@ -13,8 +13,6 @@
 #include "TEllipse.h"
 #include "TGraphNode.h"
 
-#include <gvc.h>
-
 ClassImp(TGraphNode)
 
 //______________________________________________________________________________

graf2d/gviz/src/TGraphStruct.cxx

@@ -15,7 +15,6 @@
 
 #include <stdio.h>
 
-#include <gvc.h>
 #include <gvplugin.h>
 
 #ifdef GVIZ_STATIC