fix calling undef inline func build error

src/core/SkClipStack.cpp

Index: src/core/SkClipStack.cpp
diff --git a/src/core/SkClipStack.cpp b/src/core/SkClipStack.cpp
index 17eb6f931d31f04d344c27ecc0228fe7a100ce0a..e5016977c9ed5cfbd43744b35a4db5682d1458d6 100644
--- a/src/core/SkClipStack.cpp
+++ b/src/core/SkClipStack.cpp
@@ -103,6 +103,18 @@ void SkClipStack::Element::asPath(SkPath* path) const {
     }
 }
 
+void SkClipStack::Element::setEmpty() {
+    fType = kEmpty_Type;
+    fFiniteBound.setEmpty();
+    fFiniteBoundType = kNormal_BoundsType;
+    fIsIntersectionOfRects = false;
+    fRect.setEmpty();
+    fRRect.setEmpty();
+    fPath.reset();
+    fGenID = kEmptyGenID;
+    SkDEBUGCODE(this->checkEmpty();)
+}
+
 void SkClipStack::Element::checkEmpty() const {
     SkASSERT(fFiniteBound.isEmpty());
     SkASSERT(kNormal_BoundsType == fFiniteBoundType);