[Gui] remove more superfluous nullptr checks

src/Gui/View3DInventorExamples.cpp

@@ -276,7 +276,7 @@ void LightManip(SoSeparator * root)
   SoInput in;
   in.setBuffer((void *)scenegraph, std::strlen(scenegraph));
   SoSeparator * _root = SoDB::readAll( &in );
-  if ( _root == nullptr ) // Shouldn't happen.
+  if (!_root) // Shouldn't happen.
       return;
   root->addChild(_root);
   root->ref();
@@ -290,7 +290,7 @@ void LightManip(SoSeparator * root)
     sa.setSearchingAll( false );
     sa.apply( root );
     SoPath * path = sa.getPath();
-    if ( path == nullptr) // Shouldn't happen.
+    if (!path) // Shouldn't happen.
         return;
 
     SoPointLightManip * manip = new SoPointLightManip;
@@ -396,7 +396,7 @@ timersensorcallback(void * data, SoSensor *)
 void AnimationTexture(SoSeparator * root)
 {
   // Scene graph
-  if ( root == nullptr ) // Shouldn't happen.
+  if (!root) // Shouldn't happen.
       return;
 
   // Generate a julia set to use as a texturemap