Fix warnings that were exposed when running with SK_DEBUG enable on an optimized release build.

src/pathops/SkPathOpsCommon.cpp

Index: src/pathops/SkPathOpsCommon.cpp
diff --git a/src/pathops/SkPathOpsCommon.cpp b/src/pathops/SkPathOpsCommon.cpp
index 86a8cb0befb65c490f3d60bf5d36f124c2086f68..c9ef7a41961d0c27d86b9b4ecab509c02ac13966 100644
--- a/src/pathops/SkPathOpsCommon.cpp
+++ b/src/pathops/SkPathOpsCommon.cpp
@@ -113,7 +113,7 @@ SkOpSegment* FindChase(SkTDArray<SkOpSpanBase*>* chase, SkOpSpanBase** startPtr,
             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);
             }