tdf#32415: Always accept English symbol names in math

If symbol name does not match localized names, try to find a match using
English (export) names.

Change-Id: Id668ee68b07c8431c2780b78e26e07d3aef043aa
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/155553
Tested-by: Jenkins
Reviewed-by: خالد حسني <khaled@libreoffice.org>

starmath/source/symbol.cxx

@@ -115,6 +115,17 @@ SmSym *SmSymbolManager::GetSymbolByName(const OUString& rSymbolName)
     SymbolMap_t::iterator aIt( m_aSymbols.find( rSymbolName ) );
     if (aIt != m_aSymbols.end())
         pRes = &aIt->second;
+    else
+    {
+        for (auto& [_, rSymbol] : m_aSymbols)
+        {
+            if (rSymbol.GetExportName() == rSymbolName)
+            {
+                pRes = &rSymbol;
+                break;
+            }
+        }
+    }
     return pRes;
 }