minor fix. refactor.

lib/widgets/bigtext.js

@@ -53,19 +53,32 @@ BigText.prototype.loadFont = function(filename) {
   this.ratio.height = data.height;
 
   function convertLetter(ch, lines) {
+    var line, i;
+
     while (lines.length > self.ratio.height) {
       lines.shift();
       lines.pop();
     }
+
     lines = lines.map(function(line) {
       var chs = line.split('');
       chs = chs.map(function(ch) {
         return ch === ' ' ? 0 : 1;
       });
-      while (chs.length < self.ratio.width) chs.push(0);
+      while (chs.length < self.ratio.width) {
+        chs.push(0);
+      }
       return chs;
     });
-    while (lines.length < self.ratio.height) lines.push([0, 0, 0, 0, 0, 0, 0, 0]);
+
+    while (lines.length < self.ratio.height) {
+      line = [];
+      for (i = 0; i < self.ratio.width; i++) {
+        line.push(0);
+      }
+      lines.push(line);
+    }
+
     return lines;
   }