Replace remaining 0 with nullptr in Qt code

Also used type-appropriate enum values such as Qt::NoItemFlags in
some cases.

All cases identified via -Wzero-as-null-pointer-constant

1 files changed, 1 insertions, 1 deletions

diff --git a/src/qt/platformstyle.cpp b/src/qt/platformstyle.cpp
index 56e0830cdc..d537d759de 100644
--- a/src/qt/platformstyle.cpp
+++ b/src/qt/platformstyle.cpp
@@ -139,6 +139,6 @@ const PlatformStyle *PlatformStyle::instantiate(const QString &platformId)
                     platform_styles[x].useExtraSpacing);
         }
     }
-    return 0;
+    return nullptr;
 }