small tweaks

lib/network/Edge.js

@@ -593,7 +593,7 @@ Edge.prototype._label = function (ctx, text, x, y) {
     ctx.fillStyle = this.options.fontColor || "black";
     ctx.textAlign = "center";
     ctx.textBaseline =  "middle";
-    if(this.options.fontStrokeWidth){
+    if (this.options.fontStrokeWidth > 0){
       ctx.lineWidth   = this.options.fontStrokeWidth;
       ctx.strokeStyle = this.options.fontStrokeColor;
       ctx.lineJoin    = 'round';

lib/network/Node.js

@@ -1028,7 +1028,7 @@ Node.prototype._label = function (ctx, text, x, y, align, baseline, labelUnderNo
     ctx.fillStyle = this.options.fontColor || "black";
     ctx.textAlign = align || "center";
     ctx.textBaseline = baseline || "middle";
-    if(this.options.fontStrokeWidth){
+    if (this.options.fontStrokeWidth > 0){
       ctx.lineWidth   = this.options.fontStrokeWidth;
       ctx.strokeStyle = this.options.fontStrokeColor;
       ctx.lineJoin    = 'round';