VD: Fix Canvas save leak

bug:16965998

Change-Id: I367388b270748e2ce114b468940966d78de07465

Author: ztenghui

graphics/java/android/graphics/drawable/VectorDrawable.java

@@ -238,14 +238,13 @@ public ConstantState getConstantState() {
 
     @Override
     public void draw(Canvas canvas) {
-        final int saveCount = canvas.save();
         final Rect bounds = getBounds();
-
         if (bounds.width() == 0 || bounds.height() == 0) {
             // too small to draw
             return;
         }
 
+        final int saveCount = canvas.save();
         final boolean needMirroring = needMirroring();
 
         canvas.translate(bounds.left, bounds.top);