[LyX/master] Fix page range without page format

[Juergen Spitzmueller]

commit d41e0c9231f6ef98e2308f6a267b6fb4e50c6fb3
Author: Juergen Spitzmueller <spitz at lyx.org>
Date:   Fri Nov 4 07:57:56 2022 +0100

    Fix page range without page format
---
 src/insets/InsetIndex.cpp |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/src/insets/InsetIndex.cpp b/src/insets/InsetIndex.cpp
index 5458c83..c7a95f3 100644
--- a/src/insets/InsetIndex.cpp
+++ b/src/insets/InsetIndex.cpp
@@ -169,6 +169,9 @@ void InsetIndex::latex(otexstream & ios, OutputParams const & runparams_in) cons
 			os << "|";
 			os << insetindexpagerangetranslator_latex().find(params_.range);
 			os << from_utf8(params_.pagefmt);
+		} else if (params_.range != InsetIndexParams::PageRange::None) {
+			os << "|";
+			os << insetindexpagerangetranslator_latex().find(params_.range);
 		}
 	} else {
 		// We check whether we need a sort key.
@@ -267,6 +270,9 @@ void InsetIndex::latex(otexstream & ios, OutputParams const & runparams_in) cons
 			os << "|"
 			   << insetindexpagerangetranslator_latex().find(params_.range)
 			   << cmd;
+		} else if (params_.range != InsetIndexParams::PageRange::None) {
+			os << "|";
+			os << insetindexpagerangetranslator_latex().find(params_.range);
 		}
 	}
 	os << '}';