lstopo/draw: better place the PCI linkspeed

The previous value (3) is fairly close to the object on the right.
2 would be too close to the vertical bar on the left.
Use 2.5 instead.

The ascii output might have to round that down to 2,
but that output doesn't have such issues anyway since characters are well separated.

Signed-off-by: Brice Goglin <Brice.Goglin@inria.fr>

utils/lstopo/lstopo-draw.c

@@ -1092,6 +1092,7 @@ bridge_draw(struct lstopo_output *loutput, hwloc_obj_t level, unsigned depth, un
   struct lstopo_obj_userdata *lud = level->userdata;
   unsigned gridsize = loutput->gridsize;
   unsigned fontsize = loutput->fontsize;
+  /* align all children even if only some of them have a linkspeed */
   unsigned speedwidth = loutput->show_text[HWLOC_OBJ_BRIDGE] ? fontsize + gridsize : 0;
 
   if (loutput->drawing == LSTOPO_DRAWING_PREPARE) {
@@ -1132,7 +1133,7 @@ bridge_draw(struct lstopo_output *loutput, hwloc_obj_t level, unsigned depth, un
 	      snprintf(text, sizeof(text), "%.0f", child->attr->pcidev.linkspeed);
 	    else
 	      snprintf(text, sizeof(text), "%0.1f", child->attr->pcidev.linkspeed);
-	    methods->text(loutput, style.t2, fontsize, depth-1, x + 3*gridsize, ymid + BRIDGE_HEIGHT/2, text);
+	    methods->text(loutput, style.t2, fontsize, depth-1, x + 2.5*gridsize, ymid + BRIDGE_HEIGHT/2, text);
 	  }
 	}
       }