Fix SkAtomics_win.h typos.

src/ports/SkAtomics_win.h

Index: src/ports/SkAtomics_win.h
diff --git a/src/ports/SkAtomics_win.h b/src/ports/SkAtomics_win.h
index f1b9ec2a62e4da22f2c65c1734586c5b93e23e3d..16923947ef0bbb3268175fbc526fc2b64338e5f6 100644
--- a/src/ports/SkAtomics_win.h
+++ b/src/ports/SkAtomics_win.h
@@ -41,7 +41,7 @@ static inline bool sk_atomic_cas(int32_t* addr, int32_t before, int32_t after) {
 }
 
 static inline void* sk_atomic_cas(void** addr, void* before, void* after) {
-    return InterlockedCompareExchange(reinterpret_cast<long*>(addr), after, before);
+    return InterlockedCompareExchangePointer(addr, after, before);
 }
 
 static inline void sk_membar_acquire__after_atomic_conditional_inc() { }