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>

3 files changed, 4 insertions, 4 deletions

diff --git a/src/opengl/gl2paintengineex/qglengineshadermanager_p.h b/src/opengl/gl2paintengineex/qglengineshadermanager_p.h
index ec472da2e8..d23b3ad550 100644
--- a/src/opengl/gl2paintengineex/qglengineshadermanager_p.h
+++ b/src/opengl/gl2paintengineex/qglengineshadermanager_p.h
@@ -372,7 +372,7 @@ private:
 class QGLEngineShaderProg
 {
 public:
-    QGLEngineShaderProg() : program(0) {}
+    QGLEngineShaderProg() : program(nullptr) {}
 
     ~QGLEngineShaderProg() {
         if (program)
diff --git a/src/opengl/gl2paintengineex/qpaintengineex_opengl2_p.h b/src/opengl/gl2paintengineex/qpaintengineex_opengl2_p.h
index abf5b8ea48..762aac2f65 100644
--- a/src/opengl/gl2paintengineex/qpaintengineex_opengl2_p.h
+++ b/src/opengl/gl2paintengineex/qpaintengineex_opengl2_p.h
@@ -175,9 +175,9 @@ public:
 
     QGL2PaintEngineExPrivate(QGL2PaintEngineEx *q_ptr) :
             q(q_ptr),
-            shaderManager(0),
+            shaderManager(nullptr),
             width(0), height(0),
-            ctx(0),
+            ctx(nullptr),
             useSystemClip(true),
             elementIndicesVBOId(0),
             opacityArray(0),
diff --git a/src/opengl/gl2paintengineex/qtextureglyphcache_gl_p.h b/src/opengl/gl2paintengineex/qtextureglyphcache_gl_p.h
index e76216ef5d..7c12ce8998 100644
--- a/src/opengl/gl2paintengineex/qtextureglyphcache_gl_p.h
+++ b/src/opengl/gl2paintengineex/qtextureglyphcache_gl_p.h
@@ -139,7 +139,7 @@ public:
 
     inline void setPaintEnginePrivate(QGL2PaintEngineExPrivate *p) { pex = p; }
 
-    inline const QOpenGLContextGroup *contextGroup() const { return m_textureResource ? m_textureResource->group() : 0; }
+    inline const QOpenGLContextGroup *contextGroup() const { return m_textureResource ? m_textureResource->group() : nullptr; }
 
     inline int serialNumber() const { return m_serialNumber; }