Fix the build with ENABLE_DECODE=n.

  pv/dialogs/settings.cpp: In member function ‘QWidget* pv::dialogs::Settings::get_decoder_settings_form(QWidget*) const’:
  pv/dialogs/settings.cpp:218:1: error: no return statement in function returning non-void [-Werror=return-type]

diff --git a/pv/dialogs/settings.cpp b/pv/dialogs/settings.cpp
index ada41183becb816d47aeb973ea0697cfae4b8ba1..8ad8e068e933061ccbe2e0202194cb84fe2d0095 100644 (file)
--- a/pv/dialogs/settings.cpp
+++ b/pv/dialogs/settings.cpp
@@ -214,6 +214,7 @@ QWidget *Settings::get_decoder_settings_form(QWidget *parent) const
        return form;
 #else
        (void)parent;
+       return nullptr;
 #endif
 }