starmath: Omit SmParser::GetError()'s argument

as it was always 0.

Change-Id: I59570967deb139f258e7aeaab17619f714bc7bb5
Reviewed-on: https://gerrit.libreoffice.org/49640Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Takeshi Abe <tabe@fixedpoint.jp>

starmath/inc/parse.hxx

@@ -128,7 +128,7 @@ public:
     void        AddError(SmParseError Type, SmNode *pNode);
     const SmErrorDesc*  NextError();
     const SmErrorDesc*  PrevError();
-    const SmErrorDesc*  GetError(size_t i);
+    const SmErrorDesc*  GetError();
     static const SmTokenTableEntry* GetTokenTableEntry( const OUString &rName );
     const std::set< OUString >&   GetUsedSymbols() const      { return m_aUsedSymbols; }
 };

starmath/source/parse.cxx

@@ -2418,14 +2418,10 @@ const SmErrorDesc *SmParser::PrevError()
 }
 
 
-const SmErrorDesc *SmParser::GetError(size_t i)
+const SmErrorDesc *SmParser::GetError()
 {
-    if ( i < m_aErrDescList.size() )
-        return m_aErrDescList[ i ].get();
-
-    if ( static_cast<size_t>(m_nCurError) < m_aErrDescList.size() )
-        return m_aErrDescList[ m_nCurError ].get();
-
+    if ( !m_aErrDescList.empty() )
+        return m_aErrDescList.front().get();
     return nullptr;
 }
 

starmath/source/view.cxx

@@ -1295,7 +1295,7 @@ void SmViewShell::SetStatusText(const OUString& rText)
 void SmViewShell::ShowError(const SmErrorDesc* pErrorDesc)
 {
     assert(GetDoc());
-    if (pErrorDesc || nullptr != (pErrorDesc = GetDoc()->GetParser().GetError(0)) )
+    if (pErrorDesc || nullptr != (pErrorDesc = GetDoc()->GetParser().GetError()) )
     {
         SetStatusText( pErrorDesc->m_aText );
         GetEditWindow()->MarkError( Point( pErrorDesc->m_pNode->GetColumn(),