Fix warnings that were exposed when running with SK_DEBUG enable on an optimized release build.
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1917223006

Review-Url: https://codereview.chromium.org/1917223006
diff --git a/src/pathops/SkPathOpsCommon.cpp b/src/pathops/SkPathOpsCommon.cpp
index 86a8cb0..c9ef7a4 100644
--- a/src/pathops/SkPathOpsCommon.cpp
+++ b/src/pathops/SkPathOpsCommon.cpp
@@ -113,7 +113,7 @@
             segment = angle->segment();
             SkOpSpanBase* start = angle->start();
             SkOpSpanBase* end = angle->end();
-            int maxWinding;
+            int maxWinding SK_INIT_TO_AVOID_WARNING;
             if (sortable) {
                 segment->setUpWinding(start, end, &maxWinding, &sumWinding);
             }