[lldb] Use nullptr instead of 0 or NULL (NFC)

This is a re-submission of 24d240558811604354a8d6080405f6bad8d15b5c
without the hunk in HostNativeThreadBase.h, which breaks builds on
Windows.

Identified with modernize-use-nullptr.

1 files changed, 3 insertions, 3 deletions

diff --git a/lldb/source/Host/common/HostNativeThreadBase.cpp b/lldb/source/Host/common/HostNativeThreadBase.cpp
index b15160b143ca..e7966d9ebaa5 100644
--- a/lldb/source/Host/common/HostNativeThreadBase.cpp
+++ b/lldb/source/Host/common/HostNativeThreadBase.cpp
@@ -18,7 +18,7 @@ using namespace lldb;
 using namespace lldb_private;
 
 HostNativeThreadBase::HostNativeThreadBase(thread_t thread)
-    : m_thread(thread), m_result(0) {}
+    : m_thread(thread), m_result(nullptr) {}
 
 lldb::thread_t HostNativeThreadBase::GetSystemHandle() const {
   return m_thread;
@@ -34,7 +34,7 @@ bool HostNativeThreadBase::IsJoinable() const {
 
 void HostNativeThreadBase::Reset() {
   m_thread = LLDB_INVALID_HOST_THREAD;
-  m_result = 0;
+  m_result = nullptr;
 }
 
 bool HostNativeThreadBase::EqualsThread(lldb::thread_t thread) const {
@@ -44,7 +44,7 @@ bool HostNativeThreadBase::EqualsThread(lldb::thread_t thread) const {
 lldb::thread_t HostNativeThreadBase::Release() {
   lldb::thread_t result = m_thread;
   m_thread = LLDB_INVALID_HOST_THREAD;
-  m_result = 0;
+  m_result = nullptr;
 
   return result;
 }