Change some smart_ptr == 0 to smart_ptr == nullptr.  Fixes http://llvm.org/bugs/show_bug.cgi?id=12185.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@152240 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/src/locale.cpp b/src/locale.cpp
index 109629d..5c4215a 100644
--- a/src/locale.cpp
+++ b/src/locale.cpp
@@ -4084,7 +4084,7 @@
     {
         __locale_unique_ptr loc(newlocale(LC_ALL_MASK, nm, 0), freelocale);
 #ifndef _LIBCPP_NO_EXCEPTIONS
-        if (loc == 0)
+        if (loc == nullptr)
             throw runtime_error("numpunct_byname<char>::numpunct_byname"
                                 " failed to construct for " + string(nm));
 #endif  // _LIBCPP_NO_EXCEPTIONS
@@ -4127,7 +4127,7 @@
     {
         __locale_unique_ptr loc(newlocale(LC_ALL_MASK, nm, 0), freelocale);
 #ifndef _LIBCPP_NO_EXCEPTIONS
-        if (loc == 0)
+        if (loc == nullptr)
             throw runtime_error("numpunct_byname<char>::numpunct_byname"
                                 " failed to construct for " + string(nm));
 #endif  // _LIBCPP_NO_EXCEPTIONS
@@ -5518,7 +5518,7 @@
     typedef moneypunct<char, false> base;
     __locale_unique_ptr loc(newlocale(LC_ALL_MASK, nm, 0), freelocale);
 #ifndef _LIBCPP_NO_EXCEPTIONS
-    if (loc == 0)
+    if (loc == nullptr)
         throw runtime_error("moneypunct_byname"
                             " failed to construct for " + string(nm));
 #endif  // _LIBCPP_NO_EXCEPTIONS
@@ -5560,7 +5560,7 @@
     typedef moneypunct<char, true> base;
     __locale_unique_ptr loc(newlocale(LC_ALL_MASK, nm, 0), freelocale);
 #ifndef _LIBCPP_NO_EXCEPTIONS
-    if (loc == 0)
+    if (loc == nullptr)
         throw runtime_error("moneypunct_byname"
                             " failed to construct for " + string(nm));
 #endif  // _LIBCPP_NO_EXCEPTIONS
@@ -5615,7 +5615,7 @@
     typedef moneypunct<wchar_t, false> base;
     __locale_unique_ptr loc(newlocale(LC_ALL_MASK, nm, 0), freelocale);
 #ifndef _LIBCPP_NO_EXCEPTIONS
-    if (loc == 0)
+    if (loc == nullptr)
         throw runtime_error("moneypunct_byname"
                             " failed to construct for " + string(nm));
 #endif  // _LIBCPP_NO_EXCEPTIONS
@@ -5692,7 +5692,7 @@
     typedef moneypunct<wchar_t, true> base;
     __locale_unique_ptr loc(newlocale(LC_ALL_MASK, nm, 0), freelocale);
 #ifndef _LIBCPP_NO_EXCEPTIONS
-    if (loc == 0)
+    if (loc == nullptr)
         throw runtime_error("moneypunct_byname"
                             " failed to construct for " + string(nm));
 #endif  // _LIBCPP_NO_EXCEPTIONS