fix the error that path is inversed for stroke and strokeAndFill styles

src/core/SkStroke.cpp

Index: src/core/SkStroke.cpp
diff --git a/src/core/SkStroke.cpp b/src/core/SkStroke.cpp
index b138c326bab497c96429ed1d111ff57954c8ab0d..7d8d707752e942982ce51f01af4e7eebe256249b 100644
--- a/src/core/SkStroke.cpp
+++ b/src/core/SkStroke.cpp
@@ -562,8 +562,9 @@ void SkStroke::strokePath(const SkPath& src, SkPath* dst) const {
         SkPath::Direction dir;
         if (src.isRect(&isClosed, &dir) && isClosed) {
             this->strokeRect(src.getBounds(), dst, dir);
-            // our answer should preserve the inverseness of the src
-            if (src.isInverseFillType()) {
+            // our answer should preserve the inverseness of the src, but the
+            // rect should not be inverse-stroked.
+            if (src.isInverseFillType() && fWidth < 0) {
                 SkASSERT(!dst->isInverseFillType());
                 dst->toggleInverseFillType();
             }
@@ -646,8 +647,9 @@ DONE:
 #endif
     }
 
-    // our answer should preserve the inverseness of the src
-    if (src.isInverseFillType()) {
+    // our answer should preserve the inverseness of the src, but the path
+    // should not be inverse-stroked.
+    if (src.isInverseFillType() && fWidth < 0) {
         SkASSERT(!dst->isInverseFillType());
         dst->toggleInverseFillType();
     }