Update flask

@@ -29,15 +29,16 @@ function activate()
 
 function detect_face(img)
 {
-	let classifier = new cv.CascadeClassifier();
-	classifier.load('haarcascade_frontalface_default.xml');
 	let canvas = document.createElement('canvas');
 	let ctx = canvas.getContext("2d")
 	ctx.src = img;	
-	
 	let src = cv.imread(canvas);
 	let dst = new cv.Mat(src.cols, src.rows, cv.CV_8UC4);
 	let gray = new cv.Mat();
+	let faces = new cv.RectVector();
+	let classifier = new cv.CascadeClassifier();
+	classifier.load('haarcascade_frontalface_default.xml');
+	
 	src.copyTo(dst);
 	cv.cvtColor(dst, gray, cv.COLOR_RGBA2GRAY, 0);
 	let msize = new cv.Size(120, 120);