[LyX/master] Amend [5c055034/lyxgit]

[Juergen Spitzmueller]

commit 47b394f2c5867b0b81ca6f6fbda26a98f53f3a51
Author: Juergen Spitzmueller <spitz at lyx.org>
Date:   Fri Oct 29 17:06:11 2021 +0200

    Amend [5c055034/lyxgit]
    
    Relying on indexes is too fragile here
---
 src/frontends/qt/GuiDocument.cpp |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/src/frontends/qt/GuiDocument.cpp b/src/frontends/qt/GuiDocument.cpp
index ee2ee17..cc74a19 100644
--- a/src/frontends/qt/GuiDocument.cpp
+++ b/src/frontends/qt/GuiDocument.cpp
@@ -4861,7 +4861,9 @@ bool GuiDocument::isValid()
 			// if we're asking for skips between paragraphs
 			!textLayoutModule->skipRB->isChecked() ||
 			// then either we haven't chosen custom
-			textLayoutModule->skipCO->currentIndex() != 5 ||
+			VSpace::VSpaceKind(textLayoutModule->skipCO->itemData(
+						   textLayoutModule->skipCO->currentIndex()).toInt())
+				!= VSpace::LENGTH ||
 			// or else a length has been given
 			!textLayoutModule->skipLE->text().isEmpty()
 		) &&