More nullptr usage in headers

Diff generated by running clang-tidy's modernize-use-nullptr checker on
the CMake-based Qt version.

Skipping src/3rdparty, examples/, tests/

Change-Id: Ib182074e2e2fd52f63093f73b3e2e4c0cb7af188
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

1 files changed, 3 insertions, 3 deletions

diff --git a/src/tools/moc/parser.h b/src/tools/moc/parser.h
index bedcbbf7e2..63f4cf0d9a 100644
--- a/src/tools/moc/parser.h
+++ b/src/tools/moc/parser.h
@@ -69,9 +69,9 @@ public:
     inline const Symbol &symbol() { return symbols.at(index-1);}
 
     Q_NORETURN void error(int rollback);
-    Q_NORETURN void error(const char *msg = 0);
-    void warning(const char * = 0);
-    void note(const char * = 0);
+    Q_NORETURN void error(const char *msg = nullptr);
+    void warning(const char * = nullptr);
+    void note(const char * = nullptr);
 
 };