Dash to use SkIsAlign2

Dash checks for alignment by actively aligning.
It should really just check for alignment.
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2366283002

Review-Url: https://codereview.chromium.org/2366283002
diff --git a/src/effects/SkDashPathEffect.cpp b/src/effects/SkDashPathEffect.cpp
index 30d7667..1dbf293 100644
--- a/src/effects/SkDashPathEffect.cpp
+++ b/src/effects/SkDashPathEffect.cpp
@@ -18,7 +18,7 @@
         , fInitialDashIndex(0)
         , fIntervalLength(0) {
     SkASSERT(intervals);
-    SkASSERT(count > 1 && SkAlign2(count) == count);
+    SkASSERT(count > 1 && SkIsAlign2(count));
 
     fIntervals = (SkScalar*)sk_malloc_throw(sizeof(SkScalar) * count);
     fCount = count;