Use nullptr instead of the literal 0

llvm-svn: 302100
Cr-Mirrored-From: sso://chromium.googlesource.com/_direct/external/github.com/llvm/llvm-project
Cr-Mirrored-Commit: 9c973b9f62edc35fac9fda6bdd29726c575d7a45
diff --git a/include/memory b/include/memory
index 3fc0e5a..a02d61c 100644
--- a/include/memory
+++ b/include/memory
@@ -3559,7 +3559,7 @@
 const void*
 __shared_ptr_pointer<_Tp, _Dp, _Alloc>::__get_deleter(const type_info& __t) const _NOEXCEPT
 {
-    return __t == typeid(_Dp) ? _VSTD::addressof(__data_.first().second()) : 0;
+    return __t == typeid(_Dp) ? _VSTD::addressof(__data_.first().second()) : nullptr;
 }
 
 #endif  // _LIBCPP_NO_RTTI
diff --git a/src/memory.cpp b/src/memory.cpp
index f6f6fe8..62e7e23 100644
--- a/src/memory.cpp
+++ b/src/memory.cpp
@@ -120,7 +120,7 @@
                                              object_owners+1))
             return this;
     }
-    return 0;
+    return nullptr;
 }
 
 #if !defined(_LIBCPP_NO_RTTI) || !defined(_LIBCPP_BUILD_STATIC)
@@ -128,7 +128,7 @@
 const void*
 __shared_weak_count::__get_deleter(const type_info&) const _NOEXCEPT
 {
-    return 0;
+    return nullptr;
 }
 
 #endif  // _LIBCPP_NO_RTTI