Revert "remove unused code -SvtLanguageTable::AddLanguageTag"

This reverts commit d812b784.

I added that code in preparation of changes I'm doing.

include/svtools/langtab.hxx

@@ -43,6 +43,13 @@ public:
      */
     static OUString     GetLanguageString( const LanguageType eType, bool bUserInterfaceSelection );
 
+    /** Add a language tag to the table.
+
+        @param  rString
+                UI visible description string. If empty, the rLanguageTag Bcp47
+                string is used instead.
+     */
+    static sal_uInt32   AddLanguageTag( const LanguageTag& rLanguageTag, const OUString& rString );
 };
 
 // Add LRE or RLE embedding characters to the string based on the

svtools/source/misc/langtab.cxx

@@ -233,4 +233,10 @@ LanguageType SvtLanguageTable::GetLanguageTypeAtIndex( sal_uInt32 nIndex )
 }
 
 
+sal_uInt32 SvtLanguageTable::AddLanguageTag( const LanguageTag& rLanguageTag, const OUString& rString )
+{
+    return theLanguageTable::get().AddItem( (rString.isEmpty() ? rLanguageTag.getBcp47() : rString),
+            rLanguageTag.getLanguageType());
+}
+
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

unusedcode.easy

@@ -68,6 +68,7 @@ StyleSettings::SetTitleHeight(long)
 StyleSettings::SetUseFlatBorders(bool)
 StyleSettings::SetUseFlatMenus(bool)
 SvpSalInstance::PostedEventsInQueue()
+SvtLanguageTable::AddLanguageTag(LanguageTag const&, rtl::OUString const&)
 SvtListener::IsListening(SvtBroadcaster&) const
 SvxDummyShapeContainer::SvxDummyShapeContainer(com::sun::star::uno::Reference<com::sun::star::drawing::XShapes>)
 SvxNumberFormatShell::IsAdded_Impl(unsigned long)