[compiler-rt] Apply modernize-use-nullptr fixes in sanitizers

- Trim spaces.
- Use nullptr in place of 0 for pointer variables.
- Use '!p' in place of 'p == 0' for null pointer checks.
- Add blank lines to separate function definitions.
- Add 'extern "C"' or 'namespace foo' comments after the appropriate
  closing brackets

This is a continuation of work from 409b7b82. The focus here is on the
various sanitizers (not sanitizer_common, as before).

Patch by Eugene Zelenko!

Differential Revision: http://reviews.llvm.org/D13225

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@248966 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/asan/asan_debugging.cc b/lib/asan/asan_debugging.cc
index 6fc5b690d..7c3a8a73b 100644
--- a/lib/asan/asan_debugging.cc
+++ b/lib/asan/asan_debugging.cc
@@ -108,14 +108,14 @@ static uptr AsanGetStack(uptr addr, uptr *trace, u32 size, u32 *thread_id,
   return 0;
 }
 
-}  // namespace __asan
+} // namespace __asan
 
 using namespace __asan;
 
 SANITIZER_INTERFACE_ATTRIBUTE
 const char *__asan_locate_address(uptr addr, char *name, uptr name_size,
                                   uptr *region_address, uptr *region_size) {
-  AddressDescription descr = { name, name_size, 0, 0, 0 };
+  AddressDescription descr = { name, name_size, 0, 0, nullptr };
   AsanLocateAddress(addr, &descr);
   if (region_address) *region_address = descr.region_address;
   if (region_size) *region_size = descr.region_size;