Topo2 - Fixed port label scale

Change-Id: I61e8c0b3661e313980cf815c54350c594c32736f
diff --git a/web/gui/src/main/webapp/app/view/topo2/topo2Link.js b/web/gui/src/main/webapp/app/view/topo2/topo2Link.js
index fbdeab3..4897052 100644
--- a/web/gui/src/main/webapp/app/view/topo2/topo2Link.js
+++ b/web/gui/src/main/webapp/app/view/topo2/topo2Link.js
@@ -307,7 +307,7 @@
 
                 var labelScale = labelDim / (labelDim * t2zs.scale());
 
-                d3.select('#topo2-portLabels')
+                d3.select('.topo2-portLabels')
                     .selectAll('.portLabel')
                     .selectAll('*')
                     .style('transform', 'scale(' + labelScale + ')');