Update OutlineSimple.php

Fix warning: count(): parameter must be an array or an object that implements countable

Author: fredroo

src/FontLib/Glyph/OutlineSimple.php

@@ -265,7 +265,7 @@ public function getSVGContours($points = null) {
       $points = $this->points;
     }
 
-    $length     = count($points);
+    $length     = (empty($points) ? 0 : count($points));
     $firstIndex = 0;
     $count      = 0;
 
@@ -332,4 +332,4 @@ protected function getSVGPath($points, $startIndex, $count) {
   function midValue($a, $b) {
     return $a + ($b - $a) / 2;
   }
-}
+}