fix(drawing/drawRect.js): Fixes the fillStyle feature of drawRect.js
fix(drawing/drawRect.js): Fixes the fillStyle feature of drawRect.js

drawRect was using a moveTo command between each lineTo which meant there was no pollygo to fill -
removing the extra moveTo calls fixes fillStyle

#1299

chafey/cornerstoneTools,cornerstonejs/cornerstoneTools,cornerstonejs/cornerstoneTools,cornerstonejs/cornerstoneTools