font clock bug fix: Transition on vecotor 4 clock between roman numerals and digits not clearing

apps/fontclock/fontclock.font.vector50.js

@@ -81,7 +81,6 @@ class RomanNumeralFont extends NumeralFont{
             x+dim[0],y+dim[1],
             x,y+dim[1]
         ]);*/
-        g.setColor(1.0,1.0,1.0);
         g.setFontAlign(-1,-1,0);
         g.setFont("Vector",50);
         g.drawString(hour_txt,x,y);

apps/fontclock/fontclock.hourscriber.js

@@ -71,7 +71,7 @@ class HourScriber {
             this.curr_numeral_font.draw(this.curr_hour_str,
                 this.curr_hour_x,
                 this.curr_hour_y);
-            //console.log("erasing old hour");
+            //console.log("erasing old hour display:" + this.curr_hour_str + " color:" + background);
             var hours_frac = this.hours / 12;
             var angle = TWO_PI*hours_frac;
             var dimensions = this.numeral_font.getDimensions(this.hours);

apps/fontclock/fontclock.js

@@ -219,6 +219,7 @@ function next_font() {
   }
 
   if (curr_font != numeral_fonts_index) {
+    console.log("numeral font changed")
     for (var i = 0; i < hour_scribers.length; i++) {
       hour_scribers[i].setNumeralFont(
           numeral_fonts[numeral_fonts_index]);