[LyX/master] Fix warnings.

[Richard Kimberly Heck]

commit d7dde0c723dabaff708a086083efa6aa896add52
Author: Richard Kimberly Heck <rikiheck at lyx.org>
Date:   Mon May 18 00:46:58 2020 -0400

    Fix warnings.
---
 src/frontends/qt/InsetParamsDialog.cpp |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/frontends/qt/InsetParamsDialog.cpp b/src/frontends/qt/InsetParamsDialog.cpp
index 5cb25ac..1abed92 100644
--- a/src/frontends/qt/InsetParamsDialog.cpp
+++ b/src/frontends/qt/InsetParamsDialog.cpp
@@ -59,7 +59,7 @@ namespace frontend {
 
 struct InsetParamsDialog::Private
 {
-	Private() : widget_(0), inset_(0), changed_(false) {}
+	Private() : widget_(nullptr), inset_(nullptr), changed_(false) {}
 	///
 	InsetParamsWidget * widget_;
 	/// The inset that was used at last Restore or Apply operation.
@@ -312,7 +312,8 @@ Dialog * createDialog(GuiView & lv, InsetCode code)
 	case VSPACE_CODE:
 		widget = new GuiVSpace;
 		break;
-	default: return 0;
+	default:
+		return nullptr;
 	}
 	InsetParamsDialog * dialog = new InsetParamsDialog(lv, widget);
 	return dialog;