Hotfix for Squeak3D on 64bits VM

The B3DRasterizer state.objects store pointers to B3D objects into a 4-bytes Smalltalk WordArray.
This means that appropriate arithmetic has to take place in order to compute the number of objects stored in that WordArray
Indeed, on 64bits VM, each object pointer is going to consume 8-bytes (2 words).

That also means that proper allocation of Smalltalk WordArray has to take place at image side.
A fix to `B3DPrimitiveRasterizerState>>initObjects:` is thus also required

    objects := B3DPrimitiveRasterizerData new: nObjects * (Smalltalk wordSize / 4)

The slang and image Smalltalk code have not been published yet.
They are waiting for approval of my Developer status on http://www.squeaksource.com/Balloon3D.html

Author: nicolas-cellier-aka-nice

src/plugins/Squeak3D/Squeak3D.c

@@ -1,9 +1,9 @@
 /* Automatically generated by
-	VMPluginCodeGenerator VMMaker.oscog-eem.2719 uuid: e40f3e94-3a54-411b-9613-5d19114ea131
+	VMPluginCodeGenerator VMMaker.oscog-eem.2721 uuid: ae80c101-9b76-4d26-907a-6466e4269ad7
    from
-	B3DEnginePlugin Balloon3D-Plugins-eem.15 uuid: d694149b-363b-4754-aa4a-7ef0cb2c5eab
+	B3DEnginePlugin Balloon3D-Plugins-nice.16 uuid: 961cec73-badd-4b71-8d02-9233e3122e21
  */
-static char __buildInfo[] = "B3DEnginePlugin Balloon3D-Plugins-eem.15 uuid: d694149b-363b-4754-aa4a-7ef0cb2c5eab " __DATE__ ;
+static char __buildInfo[] = "B3DEnginePlugin Balloon3D-Plugins-nice.16 uuid: 961cec73-badd-4b71-8d02-9233e3122e21 " __DATE__ ;
 
 
 
@@ -280,7 +280,7 @@ static double l2vSpecDir[3];
 static sqInt lightFlags;
 static float* litVertex;
 static sqInt loadBBFn;
-static const char *moduleName = "Squeak3D Balloon3D-Plugins-eem.15 " INT_EXT;
+static const char *moduleName = "Squeak3D Balloon3D-Plugins-nice.16 " INT_EXT;
 static float* primLight;
 static float* primMaterial;
 static sqInt vbFlags;
@@ -2942,10 +2942,10 @@ loadRasterizerState(sqInt stackIndex)
 		if (!(isWords(obj))) {
 			return 0;
 		}
-		objLen = slotSizeOf(obj);
+		objLen = byteSizeOf(obj);
 		objPtr = firstIndexableField(obj);
 		state.objects = (B3DPrimitiveObject **)objPtr;
-		state.nObjects = objLen;
+		state.nObjects = objLen/sizeof(B3DPrimitiveObject *);
 	}
 	obj = fetchPointerofObject(7, stateOop);
 	if (obj == (nilObject())) {