fix for msan

src/gpu/GrDefaultPathRenderer.cpp

Index: src/gpu/GrDefaultPathRenderer.cpp
diff --git a/src/gpu/GrDefaultPathRenderer.cpp b/src/gpu/GrDefaultPathRenderer.cpp
index e4f54ccd61495790a584940ebd24f92898a8b1c6..204146307957a548bfa16f45459be3141b9fe9bb 100644
--- a/src/gpu/GrDefaultPathRenderer.cpp
+++ b/src/gpu/GrDefaultPathRenderer.cpp
@@ -367,6 +367,10 @@ public:
             drawInfo.setIndexCount(0);
         }
         batchTarget->draw(drawInfo);
+
+        // put back reserves
+        batchTarget->putBackIndices((size_t)(maxIndices - indexOffset));
+        batchTarget->putBackVertices((size_t)(maxVertices - vertexOffset), (size_t)vertexStride);
     }
 
     SkSTArray<1, Geometry, true>* geoData() { return &fGeoData; }