shiboken: Replace C-style NULL by nullptr

Replace in comments, code and generated code.
Rename variable NULL_VALUE to NULL_PTR and make extern for follow-up
changes.

Rewrite code using NULL in QString::arg() (resulting apparently from
some misunderstanding that it requires a terminating nullptr) to use
printf-formatting to fix a warning: format not a string literal and no
format arguments [-Wformat-security]).

Change-Id: I97c111cadc09192132308924136eb6ede7a6bf44
Reviewed-by: Cristian Maureira-Fredes <cristian.maureira-fredes@qt.io>

1 files changed, 1 insertions, 1 deletions

diff --git a/sources/shiboken2/ApiExtractor/tests/testcodeinjection.cpp b/sources/shiboken2/ApiExtractor/tests/testcodeinjection.cpp
index 9f71b495a..c438e0c37 100644
--- a/sources/shiboken2/ApiExtractor/tests/testcodeinjection.cpp
+++ b/sources/shiboken2/ApiExtractor/tests/testcodeinjection.cpp
@@ -59,7 +59,7 @@ void TestCodeInjections::testReadFile()
 
     const char* cppCode ="struct A {};\n";
     int argc = 0;
-    char *argv[] = {NULL};
+    char *argv[] = {nullptr};
     QCoreApplication app(argc, argv);
 
     QString attribute = QLatin1String("file='") + filePath + QLatin1Char('\'');