nurbs surface resolution is now per segment rather then being distributed over the whole surface.

This is what 2D do alredy and makes resolution settings more like subsurf level.

- This makes it impossible to have a lower resolution output then the nurbs cage, however this dosnt seem a very useful feature.
- Using the do-versions from recent curve interpolation fix.

Tested with these files.

http://digilander.libero.it/pafurijaz/Files/Blender/Libellula.zip
http://digilander.libero.it/pafurijaz/Files/Blender/Martello.zip
http://digilander.libero.it/pafurijaz/Files/Blender/Punta.zip
http://digilander.libero.it/pafurijaz/Files/Blender/Phones.zip
http://digilander.libero.it/pafurijaz/Files/Blender/Tubo.zip
http://digilander.libero.it/pafurijaz/Files/Blender/Pipe.zip
http://digilander.libero.it/pafurijaz/Files/Blender/Tire.zip
http://digilander.libero.it/pafurijaz/Files/Blender/Cotton.zip

source/blender/blenkernel/intern/displist.c

@@ -1342,7 +1342,7 @@ void makeDispListSurf(Object *ob, ListBase *dispbase, int forRender)
 				makeNurbcurve(nu, data, NULL, NULL, nu->resolu);
 			}
 			else {
-				len= nu->resolu*nu->resolv;
+				len= (nu->pntsu*nu->resolu) * (nu->pntsv*nu->resolv);
 				
 				dl= MEM_callocN(sizeof(DispList), "makeDispListsurf");
 				dl->verts= MEM_callocN(len*3*sizeof(float), "dlverts");
@@ -1354,9 +1354,9 @@ void makeDispListSurf(Object *ob, ListBase *dispbase, int forRender)
 				
 				data= dl->verts;
 				dl->type= DL_SURF;
-
-				dl->parts= nu->resolu;	/* in reverse, because makeNurbfaces works that way */
-				dl->nr= nu->resolv;
+				
+				dl->parts= (nu->pntsu*nu->resolu);	/* in reverse, because makeNurbfaces works that way */
+				dl->nr= (nu->pntsv*nu->resolv);
 				if(nu->flagv & CU_CYCLIC) dl->flag|= DL_CYCL_U;	/* reverse too! */
 				if(nu->flagu & CU_CYCLIC) dl->flag|= DL_CYCL_V;